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Brass Inline Hydraulic Check Valve, Male 1/4-18 NPT Ports, PSI Cracking Pressure, Up to 2.50 GPM & 2000.00 PSI

Description & Features

The Brass Inline Hydraulic Check Valve offers efficient performance for hydraulic and pneumatic systems featuring a compact design with male 1/4-18 NPT ports. This check valve built with brass material operates effectively with a cracking pressure range of 1 to 2.5 PSI and can handle up to 2.50 GPM and 2000 PSI.

Designed by Deltrol Fluid Products it ensures a soft seat for a bubble-tight seal making it an ideal choice for systems requiring low pressure differential. The valve allows free flow in the direction marked by the arrow and ensures positive check in the opposite direction contributing to reliable system performance.

With a stainless steel ball and retainer the CMMQ20B boasts durability and a broad temperature range from -30F to 250F. The compact overall length of this valve simplifies installation making it suitable for various industrial applications.

Catalog Number: C1CN38

Supplier Part Number: CMMQ20B

Specifications

A 1.38	B 0.63	Cracking Pressure (psi) 1 to 2.5	CV Factor 0.56	Brand Deltrol Fluid Products	Brand Deltrol Fluid Products	Pack Size 1.00	UOM EA	Materials Brass	Maximum Operating Pressure 2000	Rated Flow 2.50	Rated Flow 2.5	Size 1/4	Supplier Part Number CMMQ20B	Thread 1 1/4-18 NPT	Alternate Part Numbers Alternate Part Number C1CN38, Alternate Part Number MI-00907642, Alternate Part Number MINO-00223X11572	Product Weight 0.08 lbs

Similar Products

Model Number	Size	Thread 1	Materials	Maximum Operating Pressure	Rated Flow	CV Factor	Cracking Pressure (psi)	A	B
CMMQ20S Hydraulic/Pneumatic Check Valve	1/4	1/4-18 NPT	Steel	3000	2.5	0.5600	1 to 2.5	1.38	0.63
CMMQ20B Hydraulic/Pneumatic Check Valve	1/4	1/4-18 NPT	Brass	2000	2.5	0.5600	1 to 2.5	1.38	0.63
CMMQ30B Hydraulic/Pneumatic Check Valve	1/2	1/2-14 NPT	Brass	1000	10	2.7100	1 to 2.5	2.06	0.88

Product Questions & Answers (3)

Question by: Janet E on Sep 22, 2025, 6:12 PM

Reckon this check valve would work alright for a small hydraulic system I'm puttin' together? Just need somethin' that can handle maybe 2 GPM and around 1800 PSI.

Answer by: Customer Support on Sep 23, 2025, 7:08 PM

For a setup like that, this brass inline check valve should do the trick, as it's rated up to 2.5 GPM and 2000 PSI. Make sure that 1/4-18 NPT male connection fits your needs.

Question by: Darryl A on Feb 8, 2026, 5:22 PM

what's the cracking pressure on this brass check valve got male NPT threads

Answer by: Customer Support on Feb 10, 2026, 6:36 AM

Looking at the specs, there appears to be missing information on the exact cracking pressure value in the product details provided. The valve handles up to 2.50 GPM flow rate and can work with systems up to 2000 PSI, but you'd need the complete specification sheet to get that specific cracking pressure number for your application.

Question by: Eddie H on Mar 10, 2025, 3:36 PM

reckon this brass check valve will hold up under 2000 psi without leaking

Answer by: Customer Support on Mar 12, 2025, 6:58 AM

It handles pressures up to 2000 PSI, with flow rates going as high as 2.5 GPM, making it solid for inline hydraulic setups where you need reliable one-way flow control.