Pilot-operated relief valve MDYF25-02 series

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Pilot-operated relief valve MDYF25-02 series

Product catalog summary

Technical Specifications

Operating Pressure: 315 BAR
Flow: 150 L/min
Internal Leakage: 30 ml/min max to 80% of nominal setting
Temperature Range: -40°C to +120°C (-40°F to +250°F)
Cavity: T-2407
Fluids: Mineral-based fluids with viscosities of 7.4 to 420 cSt

Product Features

Hardened, precision ground parts for durability
Compact size
Adjustment may be locked in place
Fast response to pressure surges
Low leakage design

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. When pressure at ② rises above the spring's bias pressure, the poppet is lifted, allowing flow from ② to ①.

Performance Curve

The document includes a performance curve showing the relationship between pressure drop and flow rate.

Installation Dimensions

Detailed dimensions and torque specifications are provided for installation.

Order Type

Seal-Kits: N = Buna N, V = Viton
Body Material: A = 6061-T6 aluminum (207 Bar), S = Steel (350 Bar)
Pressure Range: Various options from 150-4500 psi (10-315 bar) with preset and check pressures
Body Porting: Options include SAE 6T, SAE 8T, NPT 1/2, G1/2, and others 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

Pilot-operated relief valve MDYF25-02 series-1

机能符号 Symbol 先导式溢流阀(反向单向型) Pilot-operated Relief Valve (Reverse one-way type) 技术参数 Specifications ·工作压力 Operating Pressure 315BAR ·流量 Flow 150L/min ·内泄漏 Internal Leakage 30ml/min.max.to 80% of norminal setting ·温度 Temperature -40°C to +120°(-40°F to+250°F) ·插孔 Cavity T-2407 ·流体 Fluids Mineral-based fluids with viscosities of 7.4 to 420 cSt. ·硬化处理,零件耐久性强 Hardened,precision ground parts for durability ·紧凑的结构 Compact size ·调节杆可被锁定 Adjustment may be locked in place ·迅速响应压力变化 Fast response to pressure surges ·低泄漏设计 Low leakage design 压力-流量性能曲线 Performance Curve Pressure Drop vs.Flow 压力降 PRESSURE DROP psi(bar) 工作 Operation 当 ① 口压力超过弹簧设定压力时，锥阀芯打开， ①到② 开始溢流，防止系统过压。当在 ② 口的压力超过开启压力,②到 ① 开启。 The valve prevents flow from ① to ② until the set crack pressure at ① is achieved.The poppet then unseat allowing flow from ① to ② protecting the circuit from over pressurization

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Pilot-operated relief valve MDYF25-02 series-2

安装尺寸 INSTALLATION DIMENSIONS 订购型号 Order Type 油封 Seal-Kits N=丁腈橡胶 Buna N V=氟橡胶 Viton Ⅳ. 阀块油口 BODY PORTING 6T=SAE 6T 8T=SAE 8T 4N=NPT 1/2 阀块材质 BODY MATERIAL 4G=G1/2 A=6061- T6铝其他螺纹油口是可选择的耐压强度207Bar Other porting

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Pilot-operated relief valve MDYF25-02 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

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