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Wuxi Kaiweilian Hydraulic Machinery Co., Ltd
JF-B10H4-S,JF-B20H4-S, pressure relief valve
NegotiableUpdate on 05/21
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Overview
JF-B10H4-S,JF-B20H4-S, Pilot operated structure of pressure reducing valve: main valve core+pilot pressure regulating spring, stable and low fluctuation outlet pressure (0.3MPa). $r $n $r $n Function: Reduce high-pressure oil (such as 31.5MPa) to 8-20MPa and maintain a constant outlet pressure; Separable system pressure to meet the needs of different actuators.
Product Details
JF-B10H4-S,JF-B20H4-S, pressure relief valve
1、 Model meaning (JF-B □ H4-S)
JFPressure reducing valve (Shanghai type)
BPlate type connection
10/20/32: nominal diameter (mm)
H: nominal pressure 31.5MPa
4Pressure regulating spring assembly（H4：8–20MPa）
S: With external oil discharge port
2、 Core parameters (3 comparisons)
| model | Diameter (mm) | Pressure regulation range (MPa) | Rated flow rate (L/min) | connection method |
|---|---|---|---|---|
| JF-B10H4-S | 10 | 8–20 | 40 | plate type |
| JF-B20H4-S | 20 | 8–20 | 100 | plate type |
| JF-B32H4-S | 32 | 8–20 | 200 | plate type |
Nominal pressure31.5MPa (maximum withstand voltage)
mediumMineral hydraulic oil, emulsion, water ethylene glycol
temperature：-20℃～+80℃
adjustHandwheel (clockwise pressure increase, counterclockwise pressure decrease)
3、 Working principle
Pilot structure: main valve core+pilot pressure regulating spring,Stable export pressure with small fluctuations (± 0.3MPa).
Function: Reduce high-pressure oil (such as 31.5MPa) to8–20MPaAnd maintain a constant outlet pressure; Separable system pressure to meet the needs of different actuators.
External oil unloading (S): The pilot leaks oil and returns it to the oil tank separately,Less impact of back pressure and more stable pressure regulation.
4、 Key points for installation and selection
InstallPlate installation, oil ports P (inlet), A (outlet), T (outlet);The T-port should be returned to the fuel tank separately, and high pressure connection is prohibited.
pressure regulationFirst, loosen the locking nut and adjust from low pressure to high pressure; After adjustment, tighten the nut to prevent loosening.
selection: PressPath → Flow → Pressure regulating rangeMatching; H4 is suitable for high-pressure branches (such as 20MPa systems).
JF-B10H4-S,JF-B20H4-S, pressure relief valve
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