Drain Valve / Steam Trap S19h-16c (1/2"-2")

Drain valve is a valve, also known as hydrophobic, drain valve, is to water, air and steam system of carbon dioxide gas discharge as soon as possible, at the same time maximize the automatically to prevent leakage of steam. There are many kinds of steam traps, each with different properties.
Selection of steam trap, the first elected its features can best meet the steam heating equipment operation, before considering other objective conditions, so choose what you need steam traps is correct and effective.
According to the principle of hydrophobic valve, can be reduced to the following three types:
Mechanical type: depending on the change of the liquid level of the condensate in the steam trap, including:
Float ball type: float is a closed hollow sphere.
Exposure upward float type: float is open up barrel type.
Open down float type: float for open - down barrel type.
Thermostatic type: depending on liquid temperature change, including:
Bimetallic strip: the sensitive element is bimetallic.
Steam pressure type: the sensitive element is the bellows or ink cartridge, and the inside is filled with volatile liquid.
Thermodynamic type: changes in the thermodynamic properties of liquids.
Disk type: because under the same pressure, the fluid is different from the flow velocity of the gas, resulting in different movement and static pressure, which drives the disc valve action.
Pulse type: when the condensate of different temperature is connected through the two polarities of the orifice plate, different pressure can be formed between the orifice plates to drive the disc movement.

The disc type steam insulated hydrophobic valve has the same working principle as the thermal hydrophobic valve, and it adds a shell to the steam outdoor surface of the hydrophobic valve. The inner chamber of the shell is connected with the steam pipe and the steam is used to heat the main steam room of the steam trap. The temperature of the main steam room is not easy to cool down, the steam pressure is maintained, and the steam trap is tightly closed. When the pipeline produces condensate, the drain valve housing cools and the trap begins to drain. If there is no condensation water on the superheated steam line, the trap will not open and the work quality is high. For alloy steel body, valve core for carbide, the valve is the highest temperature is 550 ºC, durable, long service life, is a high pressure, high temperature of superheated steam trap.

Impulse type steam trap has two orifice plate and adjust valve switch according to changes in steam pressure drop, even if the valve is fully closed entrance and exit is also through the first and second holes are interlinked, remain the state of not fully closed, the steam continuously escape, large amount of steam leakage. The hydrophobic valve has a high frequency of movement, abrasion and short life. Small volume, water - resistant, can discharge air and saturated temperature water, close to continuous drainage, the maximum back pressure 25%, so the user is very few.

The orifice plate type trap is designed to control the displacement of orifice plate with different pore diameter. The structure is simple, the choice is not suitable for the discharge of water or a large amount of running steam, not suitable for the intermittent production of steam equipment or condensation water fluctuating large use of steam equipment.

Performance indicators:
Function:
1. The function of the steam trap and the use of steam equipment only require steam. In this equipment must be produced in the condensate water is harmful to the fluid, but also mixed with air and other gas condensate, become the cause of equipment failure and reduce performance. In this case, the most important function of the trap is the following three aspects:
(1) the condensate which can be quickly eliminated.
(2) prevent steam leakage.
(3) eliminate air and other non-condensable gases.
The bucket type
, basic no overheating steam or condensed water occasions, as well as under the occasion of the size of the drain valve is too large, prone to condensation water can't ensure that bucket float, resulting in valve cannot close, continuous discharge of steam. Therefore, the bucket type can not be used in the use of condensed water.
· when the pressure of the inlet side drops sharply, the condensate in the trap will evaporate again, so that the buoyancy of the bucket will disappear, resulting in the continuous discharge of the steam. Please be careful.
Ball float
· floating ball trap is concentrated in the main body, so it is necessary to prevent freezing when used in cold zone.
thermostat
· it is easy to fail on the occasion of superheated steam, do not use in this occasion.
· there is no need for thermal insulation treatment for thermostatic and thermal types. After the heat preservation treatment, it is easy to occur unperceived temperature and the steam in the transformer room cannot heat the heat, which can cause the trap to be unable to work.
Comparison of thermostatic and thermal type
Operating temperature characteristic
Due to the thermocouple is lower than the saturated steam trap - 5 ~ 10 ºC temperature began to work, so to eliminate the discharge of steam, able to work under the condition of standard pressure stability. The wax element type trap works at fixed temperature. The work of thermal trap is not related to temperature.
Working during ventilation
The thermostatic hydrophobic valve is operated at the initial stage of the ventilation and the heating time is shorter.
The heat trap valve is closed during the initial phase of ventilation, although it is improved through the design of microcracks, the heating time is longer.





Our company introduction:
Shanghai Qingjiang Valve Manufacturing Co, . Ltd. Is located in Shanghai Fengxian Industrial Zone, is a commitment to scientific research, production, sales of professional valve manufacturer. 
Company to an international metropolis -- Shanghai as the basis, make full use of regional advantages and industry, is committed to the introduction of international advanced management experience and technological innovation, and actively promote the enterprise comprehensive strength, and expand market share, formed with the gate valve, globe valve, ball valve, check valve, butterfly valve, hydraulic control valve, balance valve, relief valve, regulating valve and so on more than 60 series nearly 1000 varieties of products structure. Products nominal diameter is 1/4"-80" (DN6-2600mm) pressure 0.1MPa - 32.0MPa, temperature -196-595º C. Valve of the main materials are cast iron, ductile iron, carbon steel, alloy steel, stainless steel, copper and other materials, and according to the special needs of customers and manufacture of metal products. Widely used in construction, municipal, water supply and drainage, HVAC, fire, electricity, metallurgical, petrochemical, gas and other industries, and exported to the Middle East. Europe and the United States and Southeast Asia and other countries and regions. High quality wins the customer the consistent high praise and trust.