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A42C Spring-Operated Full-Lift Safety Valve

A42C Spring-Operated Full-Lift Safety Valve

  • Model:A42C-150LB/A42C-3000LB/A42C-600LB/A42P-150LB/A42P-3000LB/A42P-600LB/A42R-150LB/A42R-3000LB/A42R-600LB
  • Specification:DN20-DN300
  • Temperature:≦450℃
  • Medium:Water, oils, steam, gases, and corrosive media.
  • Pressure:150LB-600LB
  • Connection method:flange
  • Driving method:spring type
  • Material:Cast steel, stainless steel, bidirectional stainless steel
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A42C Spring-Operated Full-Lift Safety ValveOverview

The A42C spring-loaded full-opening safety valve is a type of safety valve that utilizes direct spring loading and a full-opening structure. The "C" in its designation indicates that the valve body material is carbon steel. When the system pressure exceeds the preset set pressure, the valve disc quickly rises to its fully open position, allowing for the rapid release of a large amount of medium; it automatically closes when the pressure returns to the specified value. This valve has a robust structure and strong versatility, serving as a standard safety relief device for providing high-capacity overpressure protection in various steam, gas, or liquid systems. It is widely used in industrial boilers, pressure vessels, compressed air systems, oil and gas storage tanks, heat exchangers, and general chemical equipment, serving as a standard high-capacity safety pressure relief device to protect systems from hazards caused by overpressure.

A42C Spring-Operated Full-Lift Safety Valve Product Diagram



A42C Spring-Operated Full-Lift Safety ValveCharacteristic

Features:

1. The fully open large-displacement design features a valve disc opening height equal to or greater than 1/4 of the flow passage diameter, providing a large discharge area and strong relief capacity (displacement), enabling rapid reduction of system pressure.

2. Carbon steel valve bodies (Type "C") are primarily cast or forged from carbon steel (such as WCB), which boasts high strength and excellent comprehensive mechanical properties, making them economical and practical.

3. The direct spring-loaded structure is simple in design and reliable in performance. The set pressure (opening pressure) can be precisely set by adjusting the screw rod, and the pressure difference between opening and closing is relatively small.

4. Wide range of application: It is suitable for a variety of non-corrosive media such as saturated steam, air, water, and oil with operating temperatures up to 300℃. It is one of the most commonly used safety valve types in the industrial field.

5. Standard flange connections are commonly used for inlet and outlet connections (such as RF flanges), ensuring stable installation and facilitating integration with the pipeline system

A42C Spring-Operated Full-Lift Safety Valvestructure principle

A42C Spring-Operated Full-Lift Safety ValveStructural Diagram

Part Name Material

NO.零件名称Part nameA42Y-160 A42Y-320 材料materialA42Y-160P A42Y-320P 材料MaterialA42Y-160R A42Y-320R 材料Material
1法兰flange35/35CrMoA2Cr131Cr18Ni12Mo2Ti
2阀座seat2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
3阀体body401Cr18Ni9Ti1Cr18Ni12Mo2Ti
4调节圈Adjusting ring2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
5阀瓣disc2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
6反冲盘recoil disk2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
7导向套guide bushing2Cr131Cr18Ni9Ti1Cr18Ni12Mo2Ti
8阀盖coverZG230-450ZG230-450ZG230-450
9阀杆stem2Cr131Cr18Ni9Ti1Cr18Ni9Ti
10弹簧spring50CrVA50CrVA包覆氟塑料fluoroplastic coating50CrVA包覆氟塑料fluoroplastic coating
11调整螺杆Adjusting screw452Cr132Cr13
12阀帽Valve capZG200-400ZG200-400ZG200-400
密封面材料Sealing surface material堆焊Co基硬质合金Surfacing Co-based cemented carbide


A42C Spring-Operated Full-Lift Safety Valvetechnology parameter

Performance Specifications Table

公称压力 Normal PressurePN1503006009001500
壳体强度 Body strengthPs(MPa)3.07.51522.538
整定压力 Set pressurePk(MPa)0.1-21.6-53.2-108-1510-25
密封压力 Seal pressurePm(MPa)90% Pk
回座压力 Reseation pressurePh(MPa)≥90% Pk
排放压力 Relieving pressurePp(MPa)≤1.1 Pk
开启高度 LiftH(mm)≥1/4 d0
适用温度 Appropriate temperatureC≤300℃
P、R≤200℃
适用介质 Appropriate medium空气、水、油品、蒸气、腐蚀性介质 Air,oil,Steam,Water,Corrosive medium


A42C Spring-Operated Full-Lift Safety Valvestandard size

A38Y Spring-Loaded Dual Safety Valves Outline Drawing

Dimension Chart

A42C150、 A42C150P、 A42C150R
公称压力 Nominal Diameter DN(in)尺 寸 Dimension(mm)
D0DD1D2btZ-ΦdDN'D'D'-1D'-2b't'Z-Φd'LL1H
Y2"×Y2"D8960.5351254-1520987043141.64-159090260
Y2"×1"D9870431454-152510879.551151.64-159692280
1"×1"D10879.5511554-154012798.573181.64-15115105290
1"×2"D10879.5511554-1550152120.592181.64-19115105290
1"×2"G12798.5731854-1550152120.592181.64-19121124320
1"×2"G12798.5731854-1565178139.5105201.64-19121124340
1"×3"G12798.5731854-1580190152.5127221.64-19124130340
2"×2"J152120.5921854-1965178139.5105201.64-19124130360
2"×3"J152120.5921854-1980190152.5127221.64-19124130360
2"×4"J178139.51052054-19100229190.5157241.68-19143137360
3"×4"L190152.51272254-19100229190.5157241.68-19162156450
4"×6"N229190.515724108-19150279241.5216261.68-22210197510
6"×8"P279241.521626108-22200343298.5270291.68-22241240740
8"×10"R343298.527029108-22250406362324311.612-25279276810
12"×14"T483432381321012-25350533476413351.612-29360360860
A42C300、 A42C300P、 A42C300R
公称压力 Nominal Diameter DN(in)尺 寸 Dimension (mm)
doDD1D2btZ-ΦdDN'D'D1'D2'b't'Z-Φd'LL1H
" /"×" /"D9566.5351554-1520987043141.64-159090260
" /"×1"D11782.5431654-192510879.551151.64-159692280
1"×1"/D12489511854-194012798.573181.64-15115105290
1"×2"D12489511854-1950152120.592181.64-19115105290
1"×2"×2"G156114.5732054-2250152120.592181.64-19121124320
1"×2"×2" /G156114.5732054-2265178139.5105201.64-19121124340
1"×3"×3"G156114.5732054-2280190152.5127221.64-19124130340
2"×2"× /H165127922258-1965178139.5105201.64-19124130360
2"×3"J165127922258-1980190152.5127221.64-19124130360
2"×4"×J1901491052458-22100229190.5157241.68-19143137360
3"×4"L210168.51272858-22100229190.5157241.68-19162156450
4"×6"N25420015732108-22150279241.5216261.68-22210197510
6"×8"P318270216381012-22200343298.5270291.68-22241240740
8"×10"R381330270421012-25250406362324311.612-25279276810
注:出口法兰为150Lb。 Remark:150Lb for outlet flange.
A42C600、 A42C600P、 A42C600R
公称压力 Nominal Diameter DN(in)尺 寸 Dimension (mm)
doDD1D2btZ-ΦdDN'D'D1'D2'b't'Z-Φd'LL1H
" /"×1"D11882.5431674-192510879.551151.64-159692290
1"×2"D12489511974-1950152120.592181.64-19115105290
1"×2"×2"D156114.5732274-2250152120.592181.64-19152124340
1"×2"×2" /D156114.5732274-2265178139.5105201.64-19152124350
1"×3"×3"F156114.5732274-2280190152.5127221.64-19152124350
2"×2"× /F165127922678-1965178139.5105201.64-19162154380
2"×3"F165127922678-1980190152.5127221.64-19162154380
2"×4"×H1901491002978-22100229190.5157241.68-19143165380
3"×4"L21016812732108-22100229190.5157241.68-19162155460
4"×6"×N27321615738108-25150279241.5216261.68-22210200520
6"×8"P356292216461012-29200343298.5270291.68-22241240750