Direct-operated relief valve MRDDA series

1 / 3 PagesView full catalog

Direct-operated relief valve MRDDA series

Product catalog summary

Technical Specifications

Operating Pressure: 350 BAR
Flow: 95 L/min
Internal Leakage: 0.7 ml/min max to 90% of nominal setting
Temperature Range: -40°C to +120°C (-40°F to +250°F)
Cavity: T-10A
Fluids: Mineral-based fluids with viscosities of 7.4 to 420 cSt

Product Features

Accepts maximum pressure at port 2; suitable for cross port relief circuits.
Adjust screw seals are exposed to system pressure; valve can only be adjusted when pressure is removed.
Insensitive to varying oil temperatures and contamination.

Operation

Direct-acting relief valves are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. When inlet pressure reaches the valve setting, it opens to the tank, throttling flow to limit pressure rise. These valves are smooth, quiet, essentially zero leak, dirt tolerant, and fast responding.

Performance Curve

The performance curve illustrates the relationship between pressure drop and flow rate, indicating efficient operation across a range of conditions.

Installation Dimensions

Detailed dimensions and torque specifications are provided for proper installation.

Order Type

Adjustment: Screw Adjust
Pressure Range Options: Various ranges from 50-6000 psi with preset values.
Seal Kits: Buna N or Viton
Body Material: 6061-T6 aluminum or steel
Body Porting: SAE and NPT 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 MRDDA series-1

机能符号 Symbol 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 95L/min ·内泄漏 Internal Leakage 0.7ml/min.max.to 90% of norminal setting ·温度 Temperature -40°C to +120°(-40°F to+250°F) ·插孔 Cavity T-10A ·流体 Fluids Mineral-based fluids with viscosities of 7.4 to 420 cSt. ·可在口2接受最大压力；适合应用在交叉端口的溢流油路中。 Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. ·调节螺杆的密封暴露在系统压力下。这意味着只有当压力被移除时，此阀才可被调节。设定流程为；检查设定，移除压力，调节阀，检查新设定。 The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is; check the setting, remove the pressure, adjust the valve, check the new setting. ·此阀对变动的油液温度和油液污染不敏感。 Valve is relatively insensitive to varying oil temperatures and oil contamination. 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

Open the catalog to page 1

Direct-operated relief valve MRDDA series-2

安装尺寸 INSTALLATION DIMENSIONS HEX 4 订购型号 Order Type Ⅰ Ⅱ Ⅲ Ⅰ. 调节方式 adjustment L=螺钉调整 Screw Adjust Ⅱ. 调压范围 Pressure Range A=500-3000psi(35-210bar) Preset:1000psi(70bar) B=300-1500psi(20-105bar) Preset:1000psi(70bar) C=1000-6000psi(70-420bar) Preset:1000psi(70bar) D=200-800psi(14-55bar) Preset:400psi(28bar) E=100-400psi(7-28bar) Preset:200psi(14bar) W=800-4500psi(55-315bar) Preset:1000psi(70bar) S=50-200psi(3.5-14bar) Preset:100psi(7bar) 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...

Open the catalog to page 2

Direct-operated relief valve MRDDA 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