I. Explanation of Model Numbers

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

102: Flow code 10 = 38 L/min (Δp = 10 bar); 2 = external pilot (Y port requires oil supply) + standard valve core

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

Sentence: D632-102B = 47.5 L/min (Δp = 14 bar) high flow + external pilot + A25 large installation surface + NBR standard seal + 280 bar high-pressure proportional valve

II. Core Parameters (Δp = 10 bar)

Rated flow: 38 L/min (Δp = 10 bar)

Common flow: 47.5 L/min (Δp = 14 bar)

Maximum pressure: 280 bar

Hysteresis: ≤ 5%

Resolution: ≤ 1%

Zero leakage: ≈ 2.2 L/min (70 bar)

Pilot method: external pilot (Y port requires independent oil supply, pressure ≥ 50 bar)

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

Coil: 28Ω, ±100mA, 0.14W

Filter: NAS 7 / ISO 4406 15/12

III. D632-102B vs 101B (Difference in Pilot Method) Table

Parameters: D632-102B, D632-101B (previous model)

Flow rate: 38 L/min (Δp = 10 bar) 38 L/min (Δp = 10 bar)

Pilot: External pilot (Y port) Internal pilot (without Y port)

Installation surface: A25 A25

Leakage: ≈2.2 L/min ≈2.0 L/min

Applicable scenarios: High-pressure and high-flow systems, main system stability, requiring an independent pilot source

Simplified oil circuit, no independent pilot source, conventional working conditions

One sentence: 102B is the external pilot version of 101B - same flow rate, same installation surface, requires Y port for oil supply, suitable for high-pressure and high-flow systems

Four. Applicable scenarios (D632-102B)

High-pressure and high-flow systems: Large presses, injection main cylinders, die-casting machines, metallurgical roll gap

Systems with large pressure fluctuations, requiring an independent pilot source for stable control

Where Y port can provide a stable pilot pressure of ≥ 50 bar

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

A25 large installation surface, high flow demand, high-pressure (≤ 280 bar) working conditions