Model Definition

• ZDR：Direct-operated pressure reducing valve series

• 6：Nominal size NG6 (6mm rated flow bore, CETOP03 mounting dimension)

• DP2：Spring spool structure, pilot pressure control type

• 43：Sandwich plate installation structure code, intermediate plate stacking mounting form

  Suffix rule: /XXYM → XX=rated regulating pressure(bar), YM=metric fine thread port configuration

Technical Parameters

1. Max inlet working pressure: 315bar

2. Adjustable outlet pressure range: 0.5~75/150/210bar (depends on suffix /75YM,/150YM)

3. Rated flow capacity: Max 30L/min under standard working condition

4. Hydraulic medium: HLP/HL/HVLP mineral hydraulic oil, viscosity 2.8~380mm²/s, working fluid temperature -20℃~+80℃

5. Mounting standard: ISO 4401-03-06-07-0 (CETOP03 sandwich plate mounting)

6. Seal material: Standard NBR nitrile rubber, optional FKM for high-temperature oil

Interface Configuration

• Oil ports: P(inlet), A(regulated outlet), T(drain return port); YM version metric fine thread connection

• Top adjustment part: Knob with lock nut + scale indicator for manual pressure setting, lockable to prevent accidental parameter drift

• Optional built-in check valve: Realizes free reverse flow from A→P when main system pressure drops

Core Functions

1. Stabilize secondary loop outlet pressure regardless of fluctuating inlet pressure and load flow variation

2. Stacked sandwich layout, multiple valves stacked in one valve block without extra manifold plate, compact assembly

3. Built-in pressure compensation spool, fast dynamic response for instantaneous load change

4. Complete overload pressure limiting protection, prevent downstream actuator overpressure damage

5. Separate external drain port T for pilot oil independent drainage, avoid backpressure interference to regulating precision

Application Scenarios

• Injection molding machine auxiliary clamping oil circuit pressure regulation

• CNC machine tool feed hydraulic clamping loop pressure control

• Automated fixture clamping pressure constant control

• Multi-circuit hydraulic equipment branch independent pressure reduction

• Hydraulic press auxiliary cylinder pressure stabilizing system

Maintenance Specification

• Replace hydraulic oil filter every 2000 working hours, clean valve core dirt when pressure regulating drift occurs

• Do not over-tighten pressure adjusting knob to avoid internal spring deformation

• Disassemble maintenance after system full pressure relief, drain residual hydraulic oil completely