It should be noted that when the valve Purchasing technical requirements which (a)

To this end, prepared to discuss this release, the revised feasibility of intra-industry exchanges, arising from the business concerns in this regard, to improve work in this area. 1.; Specifications and types of valves, pipes should be in accordance with the requirements of design documents. 1.2; the valve should be specified based on Model GB code requirements. If the enterprise standard models should be specified instructions. ? 1.3; valve working pressure of the working pressure ≥ pipeline, prices will not be affected under the premise of the valve can withstand working pressure pipe should be larger than the actual pressure of work; valve closed condition either side should be able to withstand 1.1 times the work pressure valve without leakage; valve open condition, valve body should be able to withstand twice the pressure valve work requirements. 1.4; valve manufacturing standards, should indicate the basis of the national standard code, if the enterprise standards, procurement contract shall be accompanied by a business document 2? Valve material? 2.1; valve material, gray cast iron pipe as a result of the progressive is not recommended the use of body-based material should be ductile iron, and indicate the grade and the actual casting of the physical and chemical test data. ? 2.2; stem material to stainless steel stem (2CR13), large diameter valves should be stainless steel stem inlay package. ? 2.3; nut material, the use of cast brass or cast aluminum bronze, and the hardness and strength are greater than the stem 2.4; stem bushing material, its hardness and strength shall be not more than stem and immersed in water conditions with the stem, not the formation of electrochemical corrosion body. 2.5; sealing surface of the material ① different types of valves, sealing methods and materials require different; ② ordinary wedge gate valve, the material铜环fixed way, grinding should be that way; ③ Soft sealing valve, the valve plate rubber lining material of the physico-chemical and health testing data; ④ butterfly valve body shall identify the material on the sealing surface and sealing surface material butterflies board; their physical and chemical test data, especially the health requirements of rubber, anti-aging performance, wear-resistant performance; usually small eyes, such as rubber and EPDM rubber, recycled plastic mixed prohibited. ? 2.6; valve shaft packing? ① network as a result of the valves, usually do not frequent sluicegate asked not to fill in a few years the activities do not fill the aging and long-term effects remain sealed; ② fill valve shaft should bear the frequent headstock, the sealing effect of the good; ③ the light of the above requirements, fill valve axis does not strive for life or not to replace more than a decade;? ④ For replacement of packing, valve design should be considered to have the situation under pressure to replace the measures . 3? Speed gearbox 3.1; box inside and outside the anti-corrosion materials and principles with Valve. ? 3.2; box measures should be sealed, after the tank assembly to be capable of sustaining the status of three meters of water immersion. Box 3.3 on the hoist limit devices, the adjustment nut should be箱体外. ? 3.4; drive the structural design of a reasonable gate valve when the drive shaft can only rotate, did not make it up and down a rocky ledge, moderate occlusal transmission components, with no separation of the load when the sliding headstock. ? 3.5 ; Transmission Box Office with the valve shaft seal without leakage can not be connected whole. ? 3.6;箱体外no debris, gear grease occlusal protection shall be provided. ? 4? Valve operation of institutions 4. Valve operation of the hoist direction, shall be clockwise to close. ? 4.2 ; As a result of pipeline valves,

 

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Analysis of common failures of boiler safety valve (a)

1, Introduction



Is a very important safety valve to protect the valves, widely used in a variety of pressure vessels and piping system, when the system pressure exceeds the set pressure value, it will automatically open, the excess emissions into the atmosphere of the medium and to pressure vessels to ensure the safe operation of pipeline systems and to prevent accidents, and when the system pressure back down to work pressure or slightly below the pressure of work and can automatically shut down. Safety work is directly related to the reliability of equipment and personal safety, it is necessary to pay attention.



2, safety analysis of common causes and solutions



2.1, valve leakage



In the normal operating pressure equipment, valves and valve seat sealing surface took place more than allowed levels of leakage, valve leakage will not only cause loss of media. In addition, the media will continue to leak so hard sealing material destruction, but common safety valve sealing surface of metal materials are metallic materials, although the formation make it bright and clean, but in the medium under pressure to do that do not leak very difficult. Therefore, the working medium is steam safety valve, set pressure value, if the naked eye can not see the export side, but also to listen to no leakage on the sealing performance that is qualified. Generally caused by valve leakage is due mainly to the following three conditions:



A situation is that the dirt fell on sealed surface impurities will stay sealed mat surface, resulting in valve core and the gap between the valve seat, which valve leakage. Eliminate this failure is clear that the sealing surface of falling dirt and impurities, the general shutdown in preparation for the size of the boiler repair, the first security door so steelyard weight test run, if the leakage was found after shutdown for the disintegration of maintenance, if it is point furnace steelyard weight test run after the security gate leakage was found, it is estimated that this situation is caused by the stone roller in the running after 20 minutes cooling time before running the rudder on the sealing surface to erosion.



Another situation is the sealing surface damage. Sealing surface damage caused by the following main reasons: First, material adverse sealing surface. For example, in the furnace 3 to 9, the main security gate as a result of many years of maintenance, the main security gate valve core and valve seat sealing surface have been developed generally very low, so that the hardness of the sealing surface is also greatly reduced, resulting in sealing performance, the elimination of such is the best way is to continue turning the original sealing surface, and then asked to re-surfacing by drawing processing, improve the surface hardness of the sealing surface. Attention to a certain process to ensure the quality of processing, such as the sealing surface cracks, defects such as trachoma must go on after the turning process. New processing spool valve seat must be in line with requirements of drawings. General YST103 currently used for processing steel welding rod spool sealing surface on the relatively good results. Second, repair of poor quality, the spool valve seat grinding quality standards can not eliminate this failure is based on the degree of injury after turning the use of abrasive or abrasive methods to repair sealing surface.



Another safety valve leakage caused due to improper assembly or improper parts size. Spool in the valve seat assembly process is not fully to have a light or a combination of surface phenomena, or spool valve seat sealing surface is not conducive to sealing too. The elimination method is to check with the space around the spool size and uniformity to ensure the valve core hole with the top sealing surface异正degrees, inspection departments do not allow lift spool space; in accordance with the drawings called for a suitable sealing surface to reduce the width to achieve effective sealing .



2.2, combined with body surface leakage



Means the combination of upper and lower body surface between the leakage phenomenon, caused by leakage of the main reasons that the following aspects: First, combined with the bolt face tight or tight enough partial force, resulting in a bad combination of surface sealing.

 

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Fixed air flow valve in the ventilation and air conditioning system application

Fixed air flow valve is a mechanical self-device applications that require fixed air flow ventilation and air conditioning systems. Scheduled air volume air flow control valve does not require external power, it relies on the wind pipe air force to locate the control valve position, and thus the entire range of pressure difference will be maintained at pre-set air flow on.



(A) in the new Air System



At present, in China, fan-coil air-conditioning and fresh air systems approach is still more common, particularly in some hotel rooms, most office buildings, office buildings have adopted this approach. Common practice is to set up a new air handling units on each floor, walkways, air-dried to lay new pipes, dozens of the root branch pipe from the mains, respectively, on access to each room. To hotel room, for example, each room air quantity is usually 100 m3 / h, how to do each branch pipe air flow are consistent? In general, designers tend to be in the new air branch pipe installing an air volume control valve, hoping to accomplish by means of the latter part of debugging air volume distribution. Since the new ventilation system under normal circumstances are dry tube length, short branch pipes, while the air volume control valve adjustment is neither intuitive, regulation accuracy is not satisfactory, Moreover, each room air quantity is only 100 m3 / h, air flow is very small, so debugging is almost can not be completed. Construction unit can do about a new measurement of the total air-dry air supply pipes to ensure that the air supply branch pipes sense of such a point where the wind. In order to ensure that all rooms are air quantity can be sent to meet the design values, and need a room in a construction unit Zaiqu room balance, we need only each new wind branch pipe installing a fixed air flow valve, the above problem is solved.



In high-rise residential buildings, office often holds worry about lack of fresh air volume, while designers often feel very aggrieved. Because from the drawing point of view, the values of ventilation rate standards are not low, but we tend to overlook a problem, how to design point of view to ensure that the actual results and fixed air flow valve in the fresh air system, the application is an effective measure.



Because there is currently scheduled to air volume valves mainly rely on imports more expensive, I suggest four or five-star hotels, high-grade office buildings to use more appropriate.



(B) Exhaust System



A good air-conditioning system design, and its ventilation system must be very reasonable, and this is often not given due attention. In the civil construction, particularly in high-rise building, the envelope of air tightness good, just less air flow can maintain the room pressure value. Approximately 85 ~ 90% of the volume of outdoor air must be exhausted to the outside through the exhaust organized, so as to ensure the air supply, exhaust air flow balance, otherwise no amount of fresh air rate can not be sent to the room. In the civil construction, the ventilation in general through the toilet, drinking water and other auxiliary space between the exhaust outdoors. In addition, sometimes a ventilation system should be further increased in order to guarantee delivery, exhaust balance. For the bathroom ventilation, common practice is to set up one for each bathroom, two bathroom ventilators, exhaust and ventilation shaft on the machine interlock. We know that high-rise buildings fresh air system should be run throughout the year, the corresponding ventilation system should be run throughout the year. In other words, people can not use the bathroom toilet ventilator to control the opening, located toilet ventilator, there is no need to. Moreover, a large fan with dozens of such a small exhaust fan system is running both difficult to match, and uneconomical. Exhaust capacity of 400m3 / h of the toilet ventilators have 40dB noise around, so that loss of a quiet toilet. A large number of bathroom ventilators also bring great trouble to maintain. To address this problem, we can cancel the bathroom ventilators, ventilation shaft on each floor in the addition of a branch pipe fixed air volume valves, shaft at the top of an exhaust fan is located. This ventilation system to ensure that roughly equal the amount of each layer of the exhaust, while the control system is simple, reliable, and the bathroom can be very quiet.



(C) VAV System



In the variable air volume air conditioning system, generally outside the area will adopt the variable air volume mode set air volume within the area will adopt the way, in a wind, air pressure changing the air supply system, air volume within the areas as set design is inseparable from the air flow valve.



(D) in the purification of air-conditioning system



In the clean air-conditioning system to maintain the value of critical pressure clean room, in the exhaust ventilation system or to send Canada to set air flow valve, can effectively guarantee the value of positive pressure clean room.



Clean operating room with surgery without positive pressure when required to keep the operating room, surgery to ensure positive pressure when the volume of outdoor air quantity needed to add the required volume of outdoor workers, surgery without positive pressure when the volume of outdoor air to only guarantee the required volume of outdoor air, the new air duct on the need to set up a double-digit fixed air volume valves.



(E) in the wind pipe on the application of balanced



In the entire air system, due to construction conditions, the impact of resistance among the various branch tube is certainly not balanced, generally use the three-way valves or a multi-leaf off the air flow control valve to complete the distribution. To ensure that important room or the main branch pipe on the amount of wind Buzhi Yu is too large or too small, to reduce debug blindness, may be appropriate to increase air flow valves set to replace the three-way valves or a multi-leaf off the valve.



(6), will feature the use of air volume



Fixed air flow valve is automatic machinery bodies, no external power, plus the electric actuator can be by remote control signal to change the flow settings. Fixed air flow valve in the delivery, ventilation systems can be applied, the working temperature is generally 10 ~ 50 ℃, pressure range of 50 ~ 1000Pa, the valve before the valve at least 50Pa differential pressure applications, or fixed air flow valve does not work. This point should be noted that, as the new air system air pressure value of fresh air units are generally not large. Fixed air flow valves installed regardless of location restrictions, but should ensure that the level of valve shaft, generally require a long side of the valve straight-line distance of 1.5 times and 0.5 times the duct entrance of a straight line from the exit duct. Fixed air flow valve control, high precision, scale external pointer shows flow to regulate the accuracy is about ± 4%, limiting not required to maintain, for matching with the system scheduled to air volume valves rectangular, circular, insulation, muffler type may choose.



As the balancing valve in the air-conditioning water system is increasingly being used by the general designer, as scheduled air volume valves because that is precisely adjustable, self-balancing features will also be in the delivery, exhaust system has been widely used. 

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Structural characteristics of the track ball valve

 Switch no wear: Ball deviate from the seat after the rotation, eliminating the friction with the valve seat to solve the traditional ball valve, gate valve, plug valve seat wear problems.

     Single-seat design: the static single-track valve seat, can protect the bi-directional zero leakage, avoiding double-seat cavity pressure increases problems.

     Wear a hard sealing surface spool: spool sealing surface layer of cemented carbide surfacing and polishing, to meet the media in a very demanding sealing occasions.

     Pairs of stem-oriented marketing: Stem-oriented groove along a rigid guide pins slide smoothly control the stem of the movements and rotation.

     Mechanical wedge tight power: stem lower end of the cam slope, which provides a mechanical wedge tight force, in order to ensure continuous spool pieces closely aligns with the seat edge.

     Upload design: In the system, pressure relief, the available on-line inspection and repair, so that simplified maintenance.

     Within the leakage detection: Valve to design a special device, available on-line detection of leakage within the valve.

     Low-torque operation: Due to the track ball valve sealing surface without friction, rotation torque is small, except large size need to gear the outside world, can be equipped with a small gear.

     The best flow characteristics: full-path and standard diameter have a high Cv value, reducing the pressure drop along the pipeline, so that the problem reduces wear and tear to a minimum.

     Self-Cleaning: When the spool deviate from the valve seat, the media, along the sealing surface of a 360-degree movement of the medium, washed clean of impurities.

     Can be injected into sealing grease: In the operation can be maintained, will inject grease through the grease seal device implantation, complete control will be valve to prevent leakage.

     Long life: Track ball valve can be easy to replace those Sealing failure of ordinary ball valve, gate valve, globe valve, plug valves. The unique characteristics of the track ball can be effective in reducing the device failure rate, greatly reducing the user's use, maintenance costs. 

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How to make better in the radiator valves play a role in (c)

This valve system is installed, consideration may be given in the first group of the front radiator inlet valve installed in the vicinity of Far, Far EasTone will valve temperature control sensors to be placed in the main room, such as master bedroom, living room . The drawbacks of this arrangement is to move through the valve, will lead to heating the entire room changes in water flow, and valve signal acquisition is only room for one of the signal, then there will be other room temperature fluctuations and precision can not be effective regulation. In this way could also be considered in the first group to install high-quality front-end radiator, opening with the linear relationship between flow control valve manually through the control valve regulating the system of rough. Radiator arrangement such as "standards" are not allowed, we do not recommend using this approach.



2) the level of single-tube by leaps and bounds: the level of single-tube by leaps and bounds in recent years the application of a more interior arrangement has the merit of each radiator can be accurate for temperature control, adapted to the user's personalized home request , also in line with the "household metering, sub-room temperature" of the policy requirements. At the same time as some high-temperature hot water (not through the radiator heat exchanger) flows to the next group of radiators, the next group to raise the water temperature of the radiator to ensure the quality of the heating.



Relative to other household level for the indoor ring arrangement, by leaps and bounds in single-tube is a relatively simple to adapt to a wide range of layout. In specific applications, the valve should be used in different products (including manual control valve). Its also a very wide range of application forms:



a, Two-valve control type across Canada in this way a relatively simple structure, low cost. However, in practical applications, there are some problems. Many of its projects, because of indiscriminate use of high resistance of the two-valve, causing the radiator into the water is too small. Some works, some of the wrong usage, in order to meet the needs of the radiator into the water, across the tube had to install a regulator valve to increase the resistance across the tube part. Even with the low resistance to the two pass radiator valves should also factor into the calculation of flow. Radiator inlet channel coefficient is part of the radiator and across the tube part of the ratio of channel resistance. Increase in the level across the single-tube system, the resistance ratio of more than 30% in general, to ensure the water flow of the radiator. However, this calculation more complicated.



B, type of bypass valve



In order to adapt to the indoor levels are one-pipe system plus applications across a number of manufacturers introduced a special kind of bypass valve, the valve to the radiator such access (including valve) and a combination of bypass slip overall, and slip into a bypass resistance adjustable bypass valve. The advantage of simplifying the calculation and installation, and as a result of an adjustable bypass valve on the system to adapt to a wide range of specific conditions in accordance with a separate regulation.



Such a bypass valve can also be calculated into the flow coefficient of the radiator. In some projects have already been adopted gradually.



C, other special type of valve



Currently on the market there were a lot of new heat sink, in order to meet these new radiator, all kinds of special type of valve products came into being.



3) the level of twin-tube type.



Household level may also be a twin-tube radiators in each inlet valve is installed to carry out sub-room temperature control. The use of such arrangement, heating of good quality can be multiple sets of radiator series of different radiator valves regulate the system through the impact of small, but regardless of the fraction or fraction of the level of twin-tube arrangement, the interior are more complicated pipe layout, the overall decoration of the room, looking a certain effect.



And vertical layout of such a dual-track system, the greater the resistance the end, the system the smaller the volatility of its impact, it should choose the high resistance of the radiator valves.



4) a twin-tube radiation.



Such arrangements have also been known as the "octopus-style" layout, but also the level of belonging to the indoor area of a twin-tube. Installed at the entrance points in each household / watershed, and sub / catchment一环讲each device connected to a radiator. The advantage of flexible arrangements, which will help to carry out at room temperature, but more complex arrangement of pipes, cost over the previous several high indoor layout. In such a system should also refer to two-pipe system using high-resistance valve, if the use of reliable manual control valve can be installed in the inlet end of each radiator can be installed in each sub / Set Water carrying out centralized control.



In August 2003, the MOC issued a "Circular on the work of the urban heating system reform guidance" clearly stipulates that in the future, new public buildings and town houses, where the use of central heating facilities must be designed, installed splitting with temperature measurement and heating system control functions, and implementation of household energy use metering and charging of the new approach. Into the 21st century, the broad masses of the people on energy saving and thermal comfort of the continually increasing demands from household metering, at room temperature has been the policy of the people. Radiator valves will also be more widely used. However, the valve can not be a simple matter of a loaded, need to go through detailed and in-depth understanding of computing products, the use of different systems for different types of valves, at the same time when the installation and post-testing should also be carried out with the design and manufacturer good communication, in accordance with appropriate adjustments to the specific circumstances in order to achieve, the purpose of fair use. 

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Temperature Control Valve Selection(b)

I studied Italian Jiekemini that can be upgraded to automatic temperature control valve known as the double-adjustable temperature control valve, and other brands the biggest difference is that it is not a temporary one-time adjustment handle products, but specially designed application of the final product has a durable, spiral-shaped teeth thread lift is a special wear-resistant trapezoidal force, pitch up to 4.5mm. There is no worry about long-term use is, of course, temporary use of more no problem. The general regulation of the handle of the temporary borrowing of the thread teeth fixed for the fine thread, thread for general triangular-shaped teeth, the pitch of only 1.5mm. Such temporary handle to rotate three times the displacement of spool 4.5mm pitch with trapezoidal thread lap rather, it means that you will open the valve from the smallest to the largest three times the time required, which often need to adjust the temperature and control valve for regulating the inconvenience is obvious.



Let's look at automatic temperature control valve, automatic temperature control valve is usually divided into two parts, valve and valve head, valve commonly used method of production of copper casting or hot forging, valve head temperature sensors are generally divided liquid and solid: solid is divided into two kinds: one is the La-system, a hot-memory alloy. Currently on the market the popular media, most of paraffin solid sensor, with little heat memory alloy. Here's the market that are common to the respective valve and valve head to make a simple introduction to automatic temperature control valve for selection for reference.



Temperature Control Valve Body: Copper casting has the advantage of casting-shaped cavity can be complex products, mold cost less, lower production costs, but the drawback is more than casting defects, materials, compressive strength is poor; In contrast, the copper body by forging dies high value and complexity of forging equipment, production costs are high, but was able to obtain high-strength products, pressure capability is also much higher than the casting, while effectively avoiding casting defects. Thus less complex shape of the body, the professional manufacturers adopt traditional methods of forging body. But there are also some manufacturers to use traditional methods of casting, this requires the user to distinguish carefully. I think the use of a radiator temperature control valve on the valve body are simple, using hot forging is very appropriate.



In the selection body should pay attention to detail when there is a lot of valve design in order to be more simple, straight-through valve body inlet and outlet in the same axis, so that while the design is simple, but the displacement of spool space will be subject to We, therefore, the general type of valve spool displacement is only 2-3mm. I studied Italian Jiekemini automatic temperature control valve body, its straight-through body design is very unique, guaranteed entry and exit axis in the same circumstances, with the dislocation channel cavity design, effectively increase the displacement of the spool space, makes the spool displacement of up to 4-5mm, which in a recent design of an automatic temperature control valve is rare. Spool displacement increases the more dirty HVAC water is very beneficial, too small spool displacement in a relatively dirty water and scale HVAC serious cases will be very prone to gridlock.



Thermostatic valve head: Temperature Control Valve head temperature sensor inside the inner filling of liquid and solid media are generally two types of liquid and solid production process due to different manufacturers in general are usually a result of restrictions by the scale of production, often using only one A process to produce liquid or solid valve head, only a few large-scale production of both types of valve head chamber of commerce to facilitate customer choice. As for the difference between the two valve head, I think it should be said in HVAC applications, there is not much difference, if we must point out the difference of the Department, I think in the following aspects: First, different size. Generally speaking, the liquid to achieve the same thermal expansion, a larger displacement of the liquid, so temperature sensor larger, so larger valve heads, with a small proportion of valve sets a little after the lack of coordination, so is preferable to use solid-type valve something more beautiful head. Second, fluid sealing technology to be more complex, the production costs are relatively solid to be a little higher, so sales prices are often higher. 3, the liquid valve head to be a little more sensitive than the solid and this is the only liquid and solid advantages in comparison, but in the HVAC field in terms of a typical large-delay system, this advantage is not much effect. All in all, whether liquid or solid thermostatic valve head, as long as a qualified product, can fully meet the EN215 standard in the time sensitive requirements. I had two Italian Jiekemini medium temperature sensor in nation-building project quality inspection center to compare measurements and found no significant differences.



It is worth mentioning that the Italian Jiekemini the installation of thermostatic valve head is also very unique, the general temperature control valve installation of the first threaded connections are used, rather Jiekemini they used their own patented technology, fast card pressure-type connections, fast and safe, effective and easy to avoid the loose screw connection manually defects.



In the body of the connection alive Festival Jiekemini also has its own patent, that is connected to hot on the live festival PTFE self-dense material, to facilitate the installation or hemp rope without wrapping raw materials, effectively increasing installation of efficiency, and achieve an effective seal. To sum up, when you want to use temperature control valve should be careful when you transfer the election, so that money can at least make the best choice, whether it is manual, dual-adjustable or automatic temperature control valve, Italy Jie Kemi Nepal can be said is the perfect choice of partner, and complete products, attentive service, all so you can get satisfaction.



Generally speaking, if the most efficient as a choice for investment principles, without regard to the benefits of energy-saving automatic temperature control valve does not consider future upgrades for automatic temperature control valve, then you can choose a purely manual temperature control valve.



If, for with very little investment, taking into account the future by the owners themselves to upgrade to automatic temperature control valve, then the optional dual-adjustable temperature control valve, a dual-adjustable thermostatic valve with pure manual temperature control valve is basically the same price.



If you want to make a one-stop choice, then can choose automatic temperature control valve, generally prices are about three times the manual temperature control valve.


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Traps correctly Selection Guide

 Traps must use the best quality products, limited funds should be used in the knife's edge. The use of high-quality trap of saving energy and increasing production efficiency of the capital investment than the purchase of the trap a few times higher. Use good quality trap can provide a huge economic benefits. The use of a wide range of trap a large amount of 10 million can not be ignored, competent leaders at all levels should attach great importance.

      Select steam traps require an accurate and precise blocking drainage, high sensitivity, can improve the utilization of steam is not leaking steam, work performance, reliable, high back pressure, long service life, easy maintenance is the preferred condition.

     1. In the production process of heat transfer equipment, drying room, fast heat exchangers, distillation equipment, such as the need for fast heat up, there does not allow the production of condensed water heating equipment, we should use mechanical-type traps.

     Mechanical-type traps are not working temperature and pressure changes, water that is Pai, undercooling is small, do not water in heating devices, can make heating equipment to achieve optimum operating temperature. Free float steam trap in which the structure of the most advanced, very sensitive, the smallest undercooling 0 ℃, can be ranked saturation temperature condensation of water, no steam leakage, merits the highest heating equipment can achieve the best efficiency. Production process heating equipment is the best trap.

     2. In steam pipe, with heat pipes, heating equipment, temperature less demanding steam equipment, we should use static-type traps heat.

      Static thermal cooling degree-type traps, Pai condensing water temperature is low, you can take full advantage of high-temperature sensible heat of condensation of water, energy-saving effect is good. Bellows steam trap in which the structure of the most advanced, no manual adjustment is very sensitive, maximum cooling rate has been 15 ℃ and 30 ℃ for the selection of two kinds of film boxes, not afraid of cold, small size, any position can be installed, in the pipeline repair and replacement of the valve core can save money and labor, long life and broad scope of application is static-type traps heat boutique.

     3. In the high temperature and pressure superheated steam piping and equipment, should use special trap superheated steam.

     Superheated steam traps in high-temperature, high pressure, low load operating conditions to isolate the bad disappear superheated steam produced by high-temperature condensate. One disc-type steam trap to use pipe insulation on the steam trap of the main steam rooms insulation, advanced structure, in the absence of condensate case, trap firmly closed, the work of high quality, long life, is a high-pressure hot special trap steam. 

  

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