Model Definition

• DR20: NG10 direct acting pressure reducing valve series

• 5: Internal spool & spring structure code for secondary pressure regulation

• 52: Sandwich stacking installation form specification

• 100: Max adjustable regulated outlet pressure 100 bar

• YM: Metric thread external drain port design with standard NBR sealing set

Technical Parameters

1. Max inlet supply pressure: 315 bar

2. Adjustable outlet pressure range: 6 ~ 100 bar

3. Rated flow capacity: Max 100 L/min under nominal working condition

4. Working medium: Mineral hydraulic oil HLP, permissible viscosity 2.8~380 mm²/s, fluid operating temperature -20℃ ~ +80℃

5. Mounting standard: ISO 4401-05-08-07-0 (NG10 / CETOP05 sandwich mounting dimension)

6. Drain layout: External separate pilot drain port (YM metric thread type)

7. Built-in accessory: Integral check valve for free reverse A→P bypass flow

Interface & Connection Configuration

• Standard port definition: P=primary inlet port, A=regulated pressure outlet port, T=external pilot drain with metric thread

• Top adjustment component: Hand regulating knob with lock nut and pressure scale for fixed pressure setting

• Bottom sealing surface: Standard NG10 flat sealing plane for direct stacking on manifold block or other modular hydraulic valves

• Seal configuration: NBR rubber as standard, FKM fluorine rubber optional for high temperature / synthetic fluid environment

Core Functions

1. Stabilize constant pressure at downstream A circuit despite primary inlet pressure fluctuation and varying load flow

2. Sandwich stacked design to combine with throttle, check and relief valve on same manifold without extra subplate, compact assembly layout

3. Independent external T drain avoids system backpressure disturbance on regulating precision

4. Integrated one-way check valve enables quick actuator retraction by free reverse oil flow when upstream main pressure drops

5. Built-in pressure limiting characteristic to protect downstream hydraulic cylinder/actuator against overpressure damage

Application Scenarios

• Medium-pressure fixture clamping hydraulic circuits on CNC machine tools

• Auxiliary pressure stabilization loop for medium-tonnage injection molding equipment

• Independent branch pressure control of multi-circuit hydraulic press system

• Automated assembly equipment hydraulic positioning and clamping unit

• Medium load metallurgical machinery auxiliary hydraulic pressure regulating circuit

Usage & Maintenance Instruction

1. Fully release system internal pressure before valve disassembly and maintenance

2. Prevent excessive tightening of adjusting knob to avoid permanent deformation of internal regulating spring

3. Replace system hydraulic filter every 2000 working hours to reduce spool sticking risk caused by oil contamination

4. Clean valve internal spool assembly with filtered clean hydraulic oil when abnormal pressure drifting appears