I. Explanation of Model Numbers

D632: D632 series two-stage nozzle flap proportional valve (high pressure, large flow)

106: Flow code 10 = 38 L/min (Δp = 10 bar); 6 = internal pilot + low leakage valve core

B: Form A25 installation surface + NBR (nitrile rubber) seal (-20 to +95°C)

Sentence: D632-106B = 38L/min high flow + internal pilot without Y port + A25 large installation surface + NBR standard seal + low leakage + 280 bar high pressure proportional valve

II. Core Parameters (Δp = 10 bar)

Rated flow: 38 L/min

Maximum pressure: 280 bar

Hysteresis: ≤ 5%

Resolution: ≤ 1%

Zero leakage: ≈ 0.8 L/min (70 bar) (much lower than 101B/102B)

Pilot method: internal pilot (without Y port, main oil circuit self-taken)

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

Coil: 28Ω, ±100mA, 0.14W

Filter: NAS 7 / ISO 4406 15/12

III. D632-106B vs 101B/102B (pilot + leakage difference) Table

Parameters: D632-106B, D632-101B (with internal pilot), D632-102B (with external pilot)

Flow rate: 38 L/min, 38 L/min, 38 L/min

Pilot: Internal pilot (without Y port), internal pilot (without Y port), external pilot (requiring Y port)

Installation surface: A25, A25, A25

Zero position leakage: ≈0.8 L/min, ≈2.0 L/min, ≈2.2 L/min

Characteristics: Internal pilot + low leakage, internal pilot + standard leakage, external pilot + standard leakage

Applicable: Energy-saving, low heat generation, long-term pressure retention

Five, applicable scenarios (D632-106B)

High flow rate, high pressure + low leakage for energy-saving requirements: long-term standby, pressure retention conditions

No independent pilot source, simplified oil circuit (without Y port)

Oil temperature ≤ 95℃, ordinary mineral hydraulic oil

Large presses, injection molding machines, metallurgical equipment, requiring low heat generation, low energy consumption

Budget-sensitive, no servo-level accuracy (≤ 5% hysteresis acceptable)

A25 large installation surface, high flow rate, high pressure (≤ 280 bar) + low leakage