Model Definition

DP2: Direct operated pressure reducing spool construction with internal pilot control structure

43: Sandwich stacking mounting form code for NG6 valve size

25: Rated regulated secondary outlet pressure 25 bar maximum adjustable setting

YM: Metric thread drain port configuration, standard NBR sealing specification

Technical Parameters

Inlet maximum working pressure: 315 bar

Adjustable outlet pressure range: 0.5~25 bar

Nominal rated flow: up to 30 L/min

Compatible hydraulic fluid: Mineral-based HLP hydraulic oil; permissible viscosity 2.8 ~ 380 mm²/s, operating fluid temperature -20℃ ~ +80℃

Mounting standard: ISO 4401-03-06-07-0 (CETOP03 NG6 sandwich dimension)

Pilot drain type: External separate drain port with metric thread per YM specification

Built-in function: Integrated check valve allowing free reverse flow from A port to P port

Interface & Connection Configuration

Port layout: P=main inlet, A=pressure-regulated outlet, T=external pilot drain (metric thread for YM version)

Top regulation assembly: Hand adjustment knob with lock nut and pressure graduation scale for locked pressure setting

Bottom mounting plane: Standard NG6 sandwich sealing surface for direct stacking onto manifold or other modular valves

Seal material: Standard NBR rubber seals, optional FKM for high-temperature or synthetic fluid application

Core Functions

Maintain stable constant pressure at secondary A circuit despite fluctuations of primary inlet P pressure and load flow variation

Modular sandwich stacking design to assemble together with throttle, check and relief valves without extra subplate

External T drain isolates pilot oil return to eliminate backpressure impact on regulation precision

Integrated reverse free-flow check valve enables quick cylinder retraction with bypass oil path when upstream pressure decreases

Prevents overpressure damage of downstream hydraulic actuators via built-in pressure limiting characteristic

Application Scenarios

Low-pressure clamping circuits for CNC machine hydraulic fixtures

Auxiliary low-pressure feed loops on small injection molding equipment

Light-load hydraulic positioning and clamping automation equipment

Multi-circuit hydraulic systems requiring independent low-pressure branch regulation

Small hydraulic press auxiliary cylinder constant-pressure control

Service & Maintenance Instruction

System pressure must be fully released before valve disassembly and overhaul

Avoid excessive tightening of adjustment knob to prevent internal regulating spring permanent deformation

Regular hydraulic filter replacement every 2000 working hours to reduce spool jamming risk from oil contamination

Pressure drift during operation mostly caused by contaminated valve spool, clean internal components with filtered hydraulic oil