How should adjust the discharge pressure and the safety valve reseating pressure

1. For the recoil safety valve plate and seat adjustment ring structure is the use of seat adjustment ring to be adjusted. High pressure safety valve cover valve, hydraulic valve, pressure relief safety valves.
First, unscrew the adjusting screw ring, and then inserted into the tool such as a screwdriver from the screw hole is exposed, toggle adjustment ring on the teeth, so that adjustment ring turning left. When the adjustment ring to the left for the counterclockwise rotation, its elevated position, the discharge pressure and reseating pressure will be reduced. Conversely, when the adjustment ring to the right rotates clockwise, reduce its position, discharge pressure and reseating pressure will be higher. Each adjustment, adjustment ring rotation rate should not be too large (usually 2-3 teeth can rotate). After each adjustment screw should be fixed, it ends in the adjustment ring groove between two teeth, both to prevent rotation of the adjustment ring, not on the adjusting ring radial pressure. For security purposes, prior to toggle adjustment ring, it should be appropriate to reduce the inlet pressure Natural Gas Safety Valve (generally should be less than 90% of the opening pressure) to prevent sudden opening during adjustment of the valve, causing the accident.
2. For having upper and lower adjusting ring (oriented sets and have a seat adjustment ring) patio heater gas valve structure, the adjustment more complex.
The adjustment ring is used to change the flow of media in the valve flap folding rear side reflection angle, thereby changing the size of the fluid forces, in order to adjust the pressure back seat. Increase the adjustment ring, the turning angle decreases, the fluid force is decreased, so that the back seat pressure increased. Conversely, when the adjustment ring on the lower, back seat pressure is reduced. Of course, the adjustment ring at the same time changing the pressure back seat, also affects the discharge pressure, which increases the adjusting ring so that the discharge pressure has increased, reducing the adjustment ring so that emissions decreased, but the degree of impact is not back Pressure on as obvious.
By adjusting the ring to change the size of the Gas Burner Safety Valve between the channel and adjusting ring, thus changing the initial valve opening pressure between the valve and adjusting ring chamber accumulate medium degree of size. When elevated seat adjustment ring, the degree of pressure build-up increases, so that the valve opening ratio stage decreases rapidly to a sudden sharp turn. Therefore, increased discharge pressure valve seat adjustment ring can be reduced. It should be noted that the seat adjustment ring should not rise too close to the valve. As leakage at the sealing surface can lead to premature valve suddenly opened, but because this time the media pressure is not enough to keep the valve in the open position, the valve was then closed, then valve occurrence frequency hopping. Seat adjustment ring is mainly used to reduce the proportion of valve, open stage and adjust the discharge pressure, but also have an impact on the pressure back seat.

Importance of safety valve dynamic stability

Range Top Burner Valve for when a sudden rise in the protected system operating pressure, resulting in an additional force elements acting on feelings, so that the element moves to open a gap in the valve passage, the medium is discharged through the gap, pressure drops.
Dynamic stability safety valve directly affects the safety valve discharge capacity and service life of components, discharge channel cross-sectional area and the discharge capacity of the Stove Top Burner Valve of the shock would reduce the safety valve, and the valve seat and the same opening height limit collision bits will damage the valve sealing surfaces and other parts, two acting safety valve most likely to produce valve shocks.
Safety valve dynamic instability is mainly due to the following reasons: safety valve discharge capacity is more than a Gas Valve For Water Heater into the media flow, spring just had big, big back pressure valve and the outside world in the chamber when the valve is opened Dynamic interference.

External pilot valve opening and closing parts of factors

Pilot valve is a safety valve. Pilot valve opening and closing parts by the external force is normally closed state, when the media pressure equipment or pipeline increases, exceeds a predetermined value open automatically discharged outside the system through the media to protect the pipeline or equipment medium pressure exceeds values ​​specified.
Gas cooking valve is mainly used for boilers, pressure vessels and piping, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role. All kinds of safety valve should be mounted vertically, the outlet valve should be no resistance, to avoid compression phenomenon. Range Dual Safety Valve before installation should be devoted to test and check their tightness. The use of the safety valve should be checked regularly.

Different types of safety valve requirements

With Gas Grill Valves requirements are different, there are closed-end and not enclosed. Enclosed discharge medium that is not compromised, the entire exhaust outlet along a predetermined, generally used for toxic and corrosive media. Enclosed is generally not used for toxic or corrosive media.

How to choose a safety valve

Safety valve, classification number, according to the structure to points, can be divided into a spring-loaded safety valve and lever safety valve. In case of large capacity requirements, harboring a pulse valve, also known as the pilot valve. According to emissions to sub-divided into a safety valve and inching valve. According to the structure and the loading mechanism to sub-divided into hammer lever Barbecue Valves, spring-loaded valve and pulse valve three. By way of medium discharge points, it is divided into fully enclosed valve, semi-closed valve and open valve three. According to the size of the valve opening is divided into spring Enlight closed high-pressure safety valve two kinds of gas stove valves and springs.
Not only to understand how the selection Oven Safety Gas Valves safety valve above classification, but also understand the media's safety valve, if there is corrosion, temperature, pressure, size (working pressure and opening pressure) interface is the use of threaded or flanged.