FISHER 657
Technical Parameters
Category Parameter Specification / Description
General Model Series 657
Type Pilot-Operated Pressure Reducing Regulator
Pressure & Temperature Body Rating (ANSI) ANSI Class 150, 300, 400, 600, 900
Max. Inlet Pressure (P1) Up to 1440 psig (99 bar) for certain classes.
Outlet Pressure Range (P2) Wide range, adjustable via the pilot spring. Common ranges from 5 to 500 psig (0.3 to 34 bar) or higher.
Flow & Sizing Flow Capacity (Cv) Very High. Ranges from ~30 to over 1000+, depending on the valve size (e.g., 1", 2", 3", 4", 6", 8").
End Connections Flanged (RF, RTJ) according to ANSI standards.
Materials & Construction Body Materials Carbon Steel (Standard), Stainless Steel, Other Alloys.
Trim Materials Stainless Steel.
Pilot Valve 657 Pilot (Reducing Pilot) - senses downstream pressure.
Options Common Pilot Options • Monitor Pilot: For overpressure protection.
• SLM (Slow Opening) Pilot: For safe start-up.
DGMC-3-PT-GW-B-41
Parameter Specification
Manufacturer Eaton
Model Number DGMC-3-PT-GW-B-41
Product Line Axiom Series
Product Type 3/2 Way Solenoid Valve, Single Solenoid, Spring Return
Ports 3 (Inlet, Outlet, Exhaust)
Positions 2
Actuation Type Single Solenoid, Spring Return
Voltage 110V AC (as indicated by the "-41" suffix)
Enclosure Rating NEMA 4X / IP65 (Dust-tight, waterjet resistant, and corrosion-resistant)
Port Type Tube Fitting (Inline)
Port Size 1/4" (This is strongly implied by the "-PT" code, where 'T' is a common designation for 1/4 inch)
Operating Pressure Range Typical for this type: 30 to 120 PSI (Consult the official datasheet for exact values)
Media Compressed Air (Lubricated or Non-Lubricated)
Body Material Engineering Plastic / Polymer
Seal Material Buna-N (Nitrile) - Standard
Coil Connection Integral Pigtail Cable (Common for this style)
Mounting Pipe-mounted via its inline ports