APTECH DOT 4B 260 NSI541-210 M5900. FA-04-18 Diaphragm pressure regulator

Specific Parameters

Fluid Parameters
Input Pressure Range: Maximum 1700 PSI (117.21 bar)
Output Pressure Range: 0-100 PSI (0-6.89 bar)
Media Compatibility: Compressed air, nitrogen, hydraulic oil and non-corrosive liquids/gases
Sealing Material: Nitrile rubber (NBR), oil-resistant and chemical corrosion-resistant
Diaphragm Material: 316 stainless steel, thickness 0.15mm, compressive strength ≥2000 PSI
Connection and Structure Parameters
Interface Specification: 4PL standard port, compatible with 1/4 inch pipe diameter
Valve Body Material: Galvanized carbon steel, with epoxy resin coating on the surface
Piston Rod Type: Single piston rod, spring-return type
Mounting Method: Pipe flange mounting, compatible with ISO standard mounting dimensions
Weight: Approximately 2.6kg
Dimensions: 180mm (L) × 120mm (W) × 150mm (H)
Operating Parameters
Operating Temperature: -20°C to 80°C
Regulation Accuracy: ±1% FS (full range)
Response Time: ≤50ms
Rated Flow: Maximum 25 SCFM (Standard Cubic Feet per Minute)
Pressure Loss: ≤3 PSI (0.21 bar)
Protection Class: IP65 (outdoor dustproof and waterproof)

Product Performance

Adopting single-stage diaphragm regulation technology, the output pressure fluctuation range is ≤±0.5 PSI, and it can operate continuously and stably under full-load input of 1700 PSI. The spring-return mechanism ensures that the piston rod automatically resets to the closed state when power or air is cut off, cutting off medium circulation to achieve safe shutdown. The combination design of nitrile rubber sealing components and stainless steel diaphragms ensures long-lasting sealing performance of the equipment without medium leakage, and the sealing life is ≥10000 hours.

The equipment has certain tolerance to medium impurities, and can be adapted to fluids containing tiny particles (diameter ≤5μm) without additional filtering devices. The pressure adjustment knob supports fine tuning, with each grid adjustment accuracy of 0.1 PSI, suitable for harsh pressure control scenarios. It can still maintain normal regulation function in -20°C low-temperature environment without sealing hardening or response delay.

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