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The ShearFlo® KR-175 pressure regulator ensures high cycle life, negligible internal leakage, and contaminant resistant operation for 1” to 2” piping in high pressure and high flow rate applications. Its modular design allows for various operator and porting options with supply pressures to 5000 psi and regulated outlet pressures ranging from 50 to 5000 psi.

PacSeal Hydraulics’ pressure regulators have become the industry standard for oil and gas BOP control systems because of their reliability, accuracy, and long-life robustness in corrosive and critical service conditions. Maintaining hydraulic system pressure at a set value is vital for all downstream components and functions. Strict inspection and testing requirements and 100% American-made components ensure quality and reliability that cannot be found anywhere else.


Supply Port Size 1” NPT or SAE ORB (2X)
Outlet Port Size 2” NPT or SAE ORB
Vent Port Size 1” NPT or SAE ORB (2X)
Working Pressure Options (Liquid) 3000 or 5000 psi
Regulated Outlet Pressure Options See Product Configurator
Cv Factor Outlet 27
Cv Factor Vent 4.1
Rated Flow 250 GPM
Temperature Rating (Regulators and Failsafe Motors) -40° to 250°F
Weight See Installation Drawings
Fluid Media Hydraulic Oil or Lubricated Water1
ShearFlo Sealing Components Hardened Stainless Steel1
Body Carbon Steel
Flanges and Operators Carbon Steel
Hardware Coated Carbon Steel
O-rings Buna-N, Viton or EPR
Backup Rings Teflon
1For water-based media, special alloy seal rings may be required for optimum performance and durability. Contact PacSeal Hydraulics at (714) 529-9495 for details.

Model Configurator and Ordering Instructions

Use the below configurator to create a model number for a KR-175 Pressure Regulator (i.e. KR-175 with NPT ports, 3000 psi supply pressure, “L” regulated outlet pressure, and Manual handle KR-175N3LM). Simply call PacSeal or use our Request a Quote tool to receive pricing.

For repair kits and other accessories, see links below.



PacSeal Hydraulics

Install Pac Seal Hydraulics - DEV

Install this application on your home screen for quick and easy access when you’re on the go.

Just tap then “Add to Home Screen”