Hot static force of trap
This kind of trap is using steam and condensate temperature caused by temperature elements of heart valve or expansion drive valve open. Hot static type of trap subcooling compared commonly big, saturated.the degree for 15 to 40 degrees, it can use part of the condensate heat, high condensate valve by entities, steam leaking, energy-saving effect is remarkable. In the steam pipe is small, heating pipes, heating equipment, heating equipment, high temperature of heating equipment, small ideal trap.
Hot static type of trap has film cassette, bellows type, double metallic chip
1 film cassette type of trap:
Film cassette trap is the main action components of metal film filling a gasification temperature than water saturation, low temperature liquids blow-off temperature below 15 ° and saturated temperature 30 ° c for two choices. Film cassette trap, particularly sensitive reaction, small volume, resistant to overheat, can be installed at any position. More than 80% of back-pressure rate, be not condensate gas and solid membrane box, long service life, convenient maintenance and use a wide range.
Starting device, or cryogenic condensed liquid membrane box, condensation, the valve is in the open position. When the condensate temperature rising gradually, film and charging liquid evaporated, within membrane, close to the closed heart valve diaphragm drive in the direction of movement, the condensed water saturation temperature, trap began to close. Film with steam temperature change control box, valves, drainage effect choke air.
2 bellows type of trap:
Bellows type of trap of stainless steel corrugated pipe valve core filling a vaporization temperature below the water saturation temperature of liquid. With the steam temperature control valves, the valve with adjustment bolts, can according to need to adjust temperature, general subcooling adjustment range 15 degrees below saturated temperature - 40. More than 70% of back-pressure rate, not frozen, small size, can be installed at any position, be not condensate gas and long service life.
When a device startup, pipe cooling water, corrugated pipe appeared in condensate liquids, heart valve in spring, the elasticity in open position. When the condensate temperature rising gradually, corrugated pipe filling liquid evaporated inflation pressure inside, deformation, increased, leading to heart valves to elongation closed direction, saturation in condensate temperature, trap began to close, with steam temperature control valves, steam drainage.
Three, bi-metal chip trap:
Bi-metal trap main part is double metal temperature elements, with steam heat distortion temperature, promote heart valve of on/off valves. Bi-metal chip trap with adjustment bolts, can according to need to adjust temperature, general subcooling adjustment range 15 degrees below saturated Celsius temperature, pressure, rate of more than 70% of condensate gas, don't be afraid of cold, small volume, resistant to water hammer, high voltage, and can be installed at any position. Bi-metal fatigue sex, must have often adjust.
When starting device, or cryogenic condensate, bi-metal is flat, valve in the spring heart valve opens, under tension. When the condensate temperature rising gradually, bi-metal temperature on components, the bending deformation and began to heart valve closed position. In the condensed water saturation temperature, trap began to close. Bi-metal with steam temperature control valves, steam drainage.
3. Thermodynamic type of trap
This kind of trap according to the principle of phase, steam and condensate through the velocity and volume change when the different thermodynamics principle, the valve slice and produce different differential pressure, the valve. Because of thermodynamic type of trap work power comes from the steam, so steam waste. Simple structure, water resistant, maximum back to 50%, noise, valves, use short life work frequently.
Thermodynamic model trap has thermodynamic type (dise-type), pulsing, hole plate
1. Thermodynamic type of trap:
Thermodynamic type trap, a sensitive piece and execute element flexible valve plate. According to the different thermodynamics principle of that, when the steam and condensate through the velocity and volume change. the valve slice and produce different differential pressure, the valve. Steam leakage rate of 3% and subcooling for 8 degrees - 15 degrees Celsius.
When a device startup, pipe cooling water, water appears on working pressure valves, quickly pushed emissions. When the water discharge, steam discharge, then by steam condensate volume and velocity is large, valves, and generate differential pressure valves in the steam flow under the influence of quick closing. When the valve is closed, piece by piece valve, the valve slice pressures under stress area is less than the stress area, because on steam trap the pressure inside the room from the steam pressure valves, so more stress on below, valve slice tightly closed. When steam trap of room temperature steam condensate, steam into the pressure inside the room. Open valve by working pressure water, water discharge, and continue to work, the continuous cycle drainage.
2 dise-type steam heat preservation type trap:
Disc type steam heat preservation type of trap, the working principle is same with the thermodynamic type of trap, the outdoor surface of the thermodynamic type steam trap increase a shell. Shell chamber and steam pipe are connected, using steam pipe to the main itself steam room for insulation. That is the main room temperature hard to reduce, maintain steam pressure, trap tightly closed. When pipelines produced condensed water, shell of trap began temperature reduction, the trap begin to drain. In superheated steam pipe if there is no water, steam trap won't open, high quality of work. For alloy valve body is cemented carbide, the highest temperature of it is 550c, durable, long service life, is special superheated steam trap for high pressure or high temperature.
3 pulsed trap:
Pulsed trap and two orifice plate according to the steam pressure regulating valves, even if the switch changes in the inlet and outlet shutoff valves are first, second holes in incomplete, closed, steam escaping steam leakage, large quantity. This trap, high frequency of action, wear short life. Small volume, water resistant, can discharge air and water temperatures, saturated drain continuously, the biggest back-pressure 25%, therefore users rarely.
4 hole plate trap:
Hole plate trap is according to different displacement, choose different diameter of holes of displacement control board. Simple structure, choose not appropriate will appear as a drainage, or apply to intermittent steam run production of steam equipment or condensation water wave large steam equipment.
