CT & CS Series 3-Port Pilot-Operated Relief Valve, 1500-3000 PSI Adjustment Range, 1-1/4 NPT Inlet & Outlet Ports

A 6.18	Adjustable Range 1500-3000	Adjustment 1	Application Applications requiring an adjustable pressure relief or regulating valve to limit the pressure in a hydraulic circuit to a desired maximum	B 4.88	Body Material Cast Iron	Check Valve No	Design Code 30	Diode No	Brand DANFOSS POWER SOLUTIONS II LLC (VICKERS)	Brand Danfoss Power Solutions	Pack Size 1.00	UOM EA	Electrical Flag No	Features Plug-and-play design\|High-performance features\|Moisture resistant	Fluid Cleanliness 19/17/14 micron	Gauge Port 7/16-20 St.Thd. O-Ring	Hi Vent Spring No	Inlet Port 1-1/4 NPT	Interface 1 1/4 In.	Leakage Standard	Manual Override No	Outlet Port 1-1/4 NPT	Performance Standard	Remote Control No	Seal Material Buna-N	Special Features None	Supplier Part Number 590283	Switch Connector No	Valve Mount Type NPTF threads	Vent Port 9/16-18 St.Thd. O-Ring	Alternate Part Numbers Alternate Part Number C1BV99, Alternate Part Number CT 10 F 30, Alternate Part Number CT10-F30, Alternate Part Number CT10F30	Product Weight 15.00 lbs

Product Questions & Answers

What size are the inlet and outlet ports on this relief valve? Just want to make sure it'll fit my existing setup.

Question by: Shane M on Oct 10, 2025, 9:18 PM

This relief valve comes with 1-1/4 NPT inlet and outlet ports, which should provide secure and reliable connections for your hydraulic system.

Answer by: Customer Support on Oct 12, 2025, 6:30 AM

Part Number	Model Number	Adjustable Range	Inlet Port	Outlet Port	Gauge Port	Vent Port	Seal Material	A	B
590283	CT-10-F-30	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
590536	CT-06-B-50	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
590538	CT-06-C-50	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
590540	CT-06-F-50	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