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CT & CS Series 3-Port Pilot-Operated Relief Valves, Up To 120 GPM & 3000 PSI

Description & Features

Adjustment Style	Adjustment knob with locking nut.
Features	In-line mounting. Gauge port. Ventable. Smooth and quiet. Continuous duty.
Maximum Flow Rate	Standard Models: 60 gpm (3/4 & -12 size), 120 gpm (1-1/4 & -20 size). High Flow Models: 90 gpm (3/4 & -12 size), 180 gpm (1-1/4 & -20 size).
Maximum Operating Pressure	3000 PSI.

Products

Model Number	Part Number	Adjustable Range	Inlet Port	Outlet Port	Gauge Port	Vent Port	Seal Material	A	B
CT-10-F-30 CT & CS Series Relief Valve	590283	1500-3000	1-1/4 NPT	1-1/4 NPT	7/16-20 St.Thd. O-Ring	9/16-18 St.Thd. O-Ring	Buna-N	6.18	4.88
CT-06-B-50 CT & CS Series Relief Valve	590536	125-1000	3/4 NPT	3/4 NPT	7/16-20 St.Thd. O-Ring	9/16-18 St.Thd. O-Ring	Buna-N	5.64	3.76
CT-06-C-50 CT & CS Series Relief Valve	590538	500-2000	3/4 NPT	3/4 NPT	7/16-20 St.Thd. O-Ring	9/16-18 St.Thd. O-Ring	Buna-N	5.64	3.76
CT-06-F-50 CT & CS Series Relief Valve	590540	1500-3000	3/4 NPT	3/4 NPT	7/16-20 St.Thd. O-Ring	9/16-18 St.Thd. O-Ring	Buna-N	5.64	3.76

Product Questions & Answers (1)

Question by: Scott G on Aug 15, 2025, 6:06 AM

Will these relief valves work okay in a hydraulic system that runs pretty much non-stop all day?

Answer by: Customer Support on Aug 16, 2025, 7:00 AM

These pilot-operated relief valves were built for continuous duty in demanding hydraulic circuits, so they should hold up well in a system that runs continuously.