Direct-operated relief valve MRDH042 series

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Direct-operated relief valve MRDH042 series

Product catalog summary

Specifications

Operating Pressure: 350 BAR
Flow: 4 L/min
Internal Leakage: 10 drops/min at 75% of crack pressure
Temperature Range: -30°C to +120°C (-22°F to +250°F)
Cavity: 04-2
Fluids: Mineral-based fluids with viscosities of 7.4 to 420 cSt

Features

Durable, precision-ground parts
Compact size for reduced space requirements
Low leakage design
Zinc-plated external parts
Fast response to pressure surges

Operation

The valve prevents flow from port ① to ② until the set crack pressure at ① is achieved. The poppet then unseats, allowing flow from ① to ②, protecting the circuit from over-pressurization.

Performance Curve

The document includes a pressure drop vs. flow performance curve for hydraulic oil at 32 cSt and 38°C.

Installation Dimensions

Details on installation dimensions and torque specifications are provided, including hex sizes and maximum torque values.

Order Type

Adjustment: Screw Adjust (S)
Pressure Range: 100-3000 psi (6.9-207 bar) or 1500-5000 psi (103-345 bar)
Seal Kits: Buna N (N) or Viton (V)
Body Material: 6061-T6 aluminum (207 Bar) or steel (350 Bar)
Body Porting: SAE 4T, with other options available

Application Areas

Transmission, engine, and powertrain control
Building and road construction equipment
Agricultural and garden machinery
Forestry and resource management equipment
Waste disposal equipment
Other professional mobile and industrial applications

Catalog excerpts

Direct-operated relief valve MRDH042 series-1

直动式溢流阀 Directly Operated Relief Valve 技术参数 Specifications ·工作压力 Operating Pressure 350BAR ·流量 Flow 4L/min ·内泄漏 Internal Leakage 10 drops/min@75% of crack pressure ·温度 Temperature -30°C to +120°C(-22°F to+250°F) ·插孔 Cavity 04-2 ·流体 Fluids Mineral-based fluids with viscosities of 7.4 to 420 cSt. ·坚固耐用的精密研磨部件 Hardened,precision ground parts for durability ·体积小巧，减少空间需求 Compact size for reduce space requirements ·低泄漏设计 Low leakage design ·所有外部零件镀锌 All external part zinc plated ·迅速响应压力变化 Fast response to pressure surges 产品特性 Features 压力降 PRESSURE DROP psi(bar) 压力-流量性能曲线 Performance Curve Pressure Drop vs.Flow

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Direct-operated relief valve MRDH042 series-2

安装尺寸 INSTALLATION DIMENSIONS HEX 3.5 HEX 11.1 扭矩TORQUE 15Nm max. HEX 14.3 扭矩TORQUE 10Nm max. 订购型号 Order Type Ⅰ. 调节方式 adjustment S=螺钉调整 Screw Adjust Ⅲ. 油封 Seal-Kits N=丁腈橡胶 Buna N V=氟橡胶 Viton Ⅳ. 阀块材质 BODY MATERIAL A=6061- T6铝耐压强度207Bar 6061- T6 aluminum alloy rated at 207Bar S=钢材耐压强度350Bar steel ra

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Direct-operated relief valve MRDH042 series-3

应用领域 AP P L I CATI ON ARE A · 传输、发动机和动力传动控制 Transmission, engine and powertrain control · 建筑和道路建设设备 Building and road construction equipment · 农业和园林机械 Agricultural and garden machinery · 林业和资源管理设备 Forestry and resource management equipment · 废弃物处理设备 Waste disposal

Open the catalog to page 3