I. Explanation of Model Numbers

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

103: Flow code 10 = 38 L/min (Δp = 10 bar); 3 = external pilot (Y port) + special matching of valve core

C: Form A25 installation surface + FKM (fluororubber) seal (-20 to +150℃)

Sentence: D632-103C = 38L/min high flow + external pilot + A25 large installation surface + FKM high-temperature seal + 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: ≈2.2 L/min (70 bar)

Pilot method: external pilot (Y port ≥ 50 bar)

Seal / Temperature: FKM (-20 to +150℃, oil-resistant, chemical-resistant, high-temperature resistant)

Coil: 28Ω, ±100mA, 0.14W

Filter: NAS 7 / ISO 4406 15/12

III. D632-103C vs 102B (Seal Material Difference) Table

Parameter: D632-103C  vs. D632-102B (Previous Model)

Flow rate: 38 L/min  38 L/min

Pilot: External pilot (Y port)  External pilot (Y port)

Installation surface: A25  A25

Sealing: FKM (-20 to +150℃)  NBR (-20 to +95℃)

Characteristics: Resistant to high temperatures, aging, and various hydraulic oils  Standard temperature, general hydraulic oil

Applicability: High-temperature systems, long lifespan, flame retardant / synthetic oil  Conventional oil temperature, ordinary mineral oil

In one sentence: 103C is the high-temperature version of 102B - same flow rate, same pilot, same installation surface. FKM seal is suitable for high-temperature / special oils

Four. Application scenarios (D632-103C)

High flow rate, high pressure + high-temperature conditions (+100 to +150℃): Metallurgical hot rolling, die casting, forging, high-temperature presses

Use flame-retardant hydraulic oil, synthetic oil or high lifespan requirements

System pressure fluctuation is large, requires an independent external pilot source for stable control

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

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