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C-175 Series Panel Mount Direct-Acting Relief Valve, 1500-3000 PSI Adjustment Range

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Description & Features

The C-175 Series Panel Mount Direct-Acting Relief Valve offers a robust solution for pressures ranging from 1500 to 3000 PSI. Its cast iron body and Buna-N seals ensure durability and reliability across various industrial applications such as die casting machine tools and turbine control. The valve is defined by its plug-and-play design moisture resistance and high-performance features.

Equipped with a knob adjustment style and jam nut for precise control it supports a maximum flow rate of 3 GPM. The valve uses 1/4 NPT inlet and outlet ports and is typically utilized to remotely control a ventable relief valve. Achieving optimal fluid cleanliness at 19/17/14 micron levels this panel mount valve is a dependable component for demanding environments.

MPN: C-175-F-20

Supplier Part Number: 631056

Specifications

Actuator Type
Direct Acting
Adjustment
With Adjustment
Body Material
Iron
Check Valve
Without Check Valve
Connection Type
NPT
Design Code
20
Dimensions
2.88 in L x 2.88 in W x 8.07 in H
Diode
Without Diode
Electrical Flag
No
grp Adjustment Style
Knob with Jam Nut
Hi Vent Spring
Without Hi-Vent Spring
Installation Type
Panel
Leakage
Standard
Manual Override
No
Media
Hydraulic Oil
Model
C-175-F-20
Nominal Size
1/4 in
Number of Handles
1
Number of Stages
1
Performance
Standard
Remote Control
Without Remote Control
Seal Material
Buna-N
Series
C-175 Series
Switch Connector
No

Product Questions & Answers (2)

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Question by: Bobby G on Nov 24, 2025, 9:15 PM
what's the pressure range on this valve and is 3000 PSI actually the top end or just a typical rating?
Answer by: Customer Support on Nov 26, 2025, 9:18 AM
The adjustment range runs from 1500 to 3000 PSI, and yes, 3000 PSI is the stated maximum operating pressure for this valve. So if your system runs anywhere in that window, you've got room to dial it in precisely using the knob and jam nut adjustment. Anything beyond 3000 PSI would be outside what this valve is rated for.
Question by: Sheila B on Jan 18, 2026, 1:33 PM
Will this relief valve work okay in a hydraulic press application?
Answer by: Customer Support on Jan 20, 2026, 12:29 PM
Absolutely, this valve is well-suited for hydraulic press applications, along with die casting, machine tools, and other demanding industrial uses.

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