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AY42H, YA802Y safety relief valve

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Safety relief valve: The safety relief valve plays a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve is opened, and a part of the gas in the system is discharged into the atmosphere, so that the system pressure does not exceed the allowable value, so as to ensure that the system does not occur due to high pressure accidents. The main parameter of the safety relief valve is the displacement, which is determined by the diameter of the valve seat and the opening height of the valve disc, by the opening height is different, and it is divided into two kinds of micro-opening and full opening. Micro-opening means that the opening height of the valve disc is 1/40 ~ l / 20 of the throat diameter of the valve seat. Full opening means that the opening height of the valve disc is 1/4 of the throat diameter of the valve seat. The safety relief valve is suitable for urban construction, chemical industry, metallurgy, petroleum, pharmaceutical, food, beverage and environmental protection

Safety relief valve model: AY42H, YA802YNominal diameter of safety relief valve: 15MM-40MMThe use pressure of safety relief valve: 16MPA-60MPA
Connection mode of safety relief valve: flange connection. Threaded connectionSafety relief valve form: spring typeSafety relief valve main function: pressure relief protection
Safety relief valve use medium: water industry pipelineSafety relief valve material: cast steel. Stainless steelSafety relief valve standard: mechanical department standard or custom non-standard





AY42H, YA802Y type safety relief valve main performance specifications

ModelNominal pressureOpen pressure gradingOperating temperature (° C)Applicable medium
AY42H-160 YA802Y-16016.06.3 ~ 16.0200Water, oil products, etc
AY42H-250 YA802Y-25025.010.0 ~ 25.0
AY42H-400 YA802Y-400 YA802Y-60040.0-60.020.0 ~ 60.0

AY42H, YA802Y type safety relief valve main parts materials

NO.Part nameMaterials
1Valve bodyCarbon steel
2Valve seatStainless steel
3Valve flapStainless steel
4BonnetWelds
5Spring50CrVA

Dimensions and connection dimensions of AY42H and YA802Y safety relief valves


ModelNominal diameterDimensions
RcZGLL1≈H
YA802Y-600151/2"1/2"5290250
251"1"52113275
401 1/2"1 1/2"52157336
Model numberNominal diameterDimensions
DD1KMZ-? dbLL1Rc≈H
AY42H-160 AY42H-250 AY42H-400151359525M48×24-2225651401/2"329
2516511530M52×26-2628801501"447
2520014538M80×36-2940901801 1/2"485
3222517042M100×36-33501002002 1/2"570

Safety valve main points of order

Safety valve medium, pressure level, opening mode (full opening/micro opening) set the take-off pressure, determine the valve size, connection mode, standard maximum temperature resistance, release flow/hour, valve body material, internal valve body structure, working principle, installation instructions and other related technical data. Safety valve selection is mainly based on (take-off pressure and neat pressure flow temperature) caliber general design institute will be given, and in fact through the steam pressure, flow and take-off pressure, you can infer the size of the safety valve. Generally, it will be smaller than the caliber selected by the design institute. When the occasion is very important or the environment is more complex, please try your best to provide design drawings and detailed parameters, by our Xuan Cheng valve company experts for your review.

Related safety valve series



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Spring external thread micro-open safety valveAir compressor safety valveSteam safety valve with external threadWelded high pressure safety valveSafety relief valve
High temperature and high pressure relief valveDouble lever safety valveSafety valve with radiatorSingle lever safety valveHigh temperature and high pressure main safety valve
Hydraulic relief valveStainless steel vacuum negative pressure safety valveSpring-loaded steam safety valveFull lift super high pressure safety valve


Product Description

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve

AY42H, YA802Y safety relief valve