The safety valve of the unique place: has simple structure, movement speed, good reliable strength, etc. The pilot valve itself is a direct utility safety valve, sometimes see fit and use other way valve. Pilot operated relief valve is suitable for use in the occasion of high pressure and large diameter. 2, the direct utility safety valve relief valve can be divided into such pilot operated relief valve, help and help device of the relief valve. But due to the load depends on structure, its load volume limit, can not be used in high pressure, large diameter. When the system pressure to reduce to the back seat, pilot valve spring tries his best to overcome suits valve inlet pressure and the utility on slide spindle, the force pilot valve seat back, the top peak open, slide spindle eventually get new flow of the body weight into the dome of the main valve chamber, close the main valve. Pilot operated relief valve ownership indirect utility safety valve. The lack of the relief valve is that it is of good sex linked to the main valve and pilot valve, the action is not as good as direct utility safety valve that prompt, reliable, and the structure is relatively complex. Pilot operated relief valve profile according to the principle of utility classification, the relief valve can be divided into direct utility safety valve and the direct utility safety valve. Q: introduction of pilot operated relief valve answer: according to the principle of utility classification, the relief valve can be divided into direct utility safety Industrial Valves and the direct utility safety valve. Pilot operated relief valve is suitable for use in the occasion of high pressure and large diameter. Pilot operated relief valve with satisfactory tightly closed performance, at the same time, its action is rarely influenced by back pressure. Office principle of pilot operated relief valve pilot operated relief valve is a safety valve composed of the main valve and pilot valve, pilot valve response system medium pressure action so stem switch main valve action itself. 2, discharge Marine valve state when the system pressure reach setting, overcome the spring force of pilot valve, pilot valve opening and closing slide shuttle pilot valve inlet channel, the main valve of the air chamber pressure after pilot valve pressure relief, because the system pressure is higher than the back pressure, sliding spindle closed inlet channel thus blocking the fluid flow in the pilot valve, at this time the main valve of the air chamber pressure decreased rapidly, the main valve disc is absolutely open, fluid through the main valve discharge voltage. 1, normally closed status ( Putting-in-service proactively status) When the system is normal office, pilot valve in the closed state, the system pressure through the inlet pressure tube, pilot valve and air chamber pressure tube to the top of the main valve disc dome air chamber, so the main valve disc on the initiation of a downward net utility strength, make the main valve in the closed state. The lack of the relief valve is that it is of good sex linked to the main valve and pilot valve, the action is not as good as direct utility safety valve that prompt, reliable, and the structure is relatively complex. I plant widely used spring safety valve ownership such relief valve. 2, the direct utility safety valve relief valve can be divided into such pilot operated relief valve, help and help device of the relief valve. 1, the direct utility safety valve direct utility safety valve is in the office media under the direct utility of open, namely the office depends on the effectiveness of the medium pressure overcome loading mechanism on the mechanical load of the disc, the valve opens. Pilot operated relief valve is to rely on from a pilot valve to discharge medium to drive or stem. Pilot operated relief valve with satisfactory tightly closed performance, at the same time, its action is rarely influenced by back pressure. 1, normally closed status ( Putting-in-service proactively status) When the system is normal office, pilot valve in the closed state, the system pressure through the inlet pressure tube, pilot valve and air chamber pressure tube to the top of the main valve disc dome air chamber, so the main valve disc on the initiation of a downward net utility strength, make the main valve in the closed state. Pilot operated relief valve ownership indirect utility safety valve. 2, discharge status when the system pressure reach setting, overcome the spring force of pilot valve, pilot valve opening and closing slide shuttle pilot valve inlet channel, the main valve of the air chamber pressure after pilot valve pressure relief, because the system pressure is higher than the back pressure, sliding spindle closed inlet channel thus blocking the fluid flow in the pilot valve, at this time the main valve of the air chamber pressure decreased rapidly, the main valve disc is absolutely open, fluid through the main valve discharge voltage. 。 Pilot operated relief valve is to rely on from a pilot valve to discharge medium to drive or stem. I plant widely used spring safety valve ownership such relief valve. The pilot valve itself is a direct utility safety valve, sometimes see fit and use other way valve. When the system pressure to reduce to the back seat, pilot valve spring tries his best to overcome suits valve inlet pressure and the utility on slide spindle, the force pilot valve seat back, the top peak open, slide spindle eventually get new flow of the body weight into the dome of the main valve chamber, close the main valve. But due to the load depends on structure, its load volume limit, can not be used in high pressure, large diameter. 1, the direct utility safety valve direct utility safety valve is in the office media under the direct utility of open, namely the office depends on the effectiveness of the medium pressure overcome loading mechanism on the mechanical load of the disc, the valve opens. Office principle of pilot operated relief valve pilot operated relief valve is a safety valve composed of the main valve and pilot valve, pilot valve response system medium pressure action so stem switch main valve action itself. The safety valve of the unique place: has simple structure, movement speed, good reliable strength, etc.
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