I. Explanation of Model Numbers

D632: D632 two-stage nozzle flap proportional valve (different from D631, with greater flow rate and higher pressure)

022: Flow code 02 = 7.6 L/min (Δp = 10 bar); 2 = internal pilot + standard valve core

A: Form A10 installation surface + NBR (nitrile rubber) seal (-20 to +95°C)

Sentence: D632-022A = 7.6 L/min low flow rate + internal pilot without external connection + A10 small installation surface + NBR standard seal + cost-effective proportional valve

II. Core Parameters (Δp = 10 bar)

Rated flow: 7.6 L/min

Maximum pressure: 280 bar (D632 standard)

Hysteresis: ≤ 5% (typical of proportional valve)

Resolution: ≤ 1%

Zero leakage: ≈ 1.0 L/min (70 bar)

Pilot method: internal pilot (no Y port required)

Sealing / Temperature: NBR (-20 to +95°C)

Coil parameters: 28Ω, ±100mA, 0.14W low power consumption

Filter: NAS 7 / ISO 4406 15/12

III. Differences between D632 and D631 (Why choose D632-022A) Table

Parameter  D632-022A  D631 with the same flow rate

Type  Proportional valve (with servo-level accuracy)  Servo valve

Flow  7.6 L/min  7.6 L/min

Maximum pressure  280 bar  210 bar

Price  Low by 30–40%  High

Hysteresis  ≤5%  ≤0.3%

Applicable scenarios  General closed-loop, open-loop, budget-sensitive  Ultra-high precision closed-loop

In one sentence: D632 is the "King of Cost Performance" - servo-level structure, proportional valve price, higher pressure resistance

Four. Application scenarios (D632-022A)

Closed-loop control for medium and small flow: Testing machines, small presses, injection molding machine auxiliary shafts

Open-loop proportional control: Lifting cylinders, clamping cylinders, speed regulation systems

Budget-sensitive, no need for ultra-high precision (≤5% hysteresis acceptable)

High-pressure conditions (≤280 bar), standard oil temperature (−20 to +95℃)

A10 small installation surface, compact space, low power consumption requirement