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Brass Inline Easy Read Flow Control Valve, Female 3/8-18 NPT Ports, Up to 10.00 GPM & 2000.00 PSI

Description & Features

The Brass Inline Easy Read Flow Control Valve, Female 3/8-18 NPT Ports, Up to 10.00 GPM & 2000.00 PSI is engineered for controlled flow in one direction and free flow in the opposite direction. It allows precise flow adjustment even under pressure, with a locking set screw for setting security.

Color coding and numerical readouts provide positive and repeatable settings, with accurate adjustments within a small fraction of a turn. This valve is suitable for pneumatic systems and lower pressure hydraulic systems, featuring a durable metal knob and stem.

Constructed from brass for body and needle, it operates efficiently within a temperature range of -15deg;F to 200deg;F. The valve incorporates Vitonreg; O-rings and Teflonreg; washer seals for enhanced durability.

Maximum Operating Pressure: 2000 PSI | Rated Flow: 10 GPM | Thread 1: 3/8-18 NPT

MPN: C1CP13

Supplier Part Number: EF25B

Specifications

A 1.63	Adjustment No	B 1	C 2.88	Check Valve No	CV Factor 0.76	Brand Deltrol Fluid Products	Brand Deltrol Fluid Products	Pack Size 1.00	UOM EA	Materials Brass	Maximum Operating Pressure 2000	Rated Flow 10	Rated Flow 10	Size 3/8	Supplier Part Number EF25B	Thread 1 3/8-18 NPT	Alternate Part Numbers Alternate Part Number C1CP13, Alternate Part Number MI-00278635, Alternate Part Number MINO-00223F25040	Product Weight 0.82 lbs

Similar Products

Model Number	Size	Thread 1	Materials	Maximum Operating Pressure	Rated Flow	CV Factor	A	B	C
EF25S Hydraulic/Pneumatic Flow Control	3/8	3/8-18 NPT	Steel	5000	10	0.7600	1.63	1	2.88
EF30S Hydraulic/Pneumatic Flow Control	1/2	1/2-14 NPT	Steel	5000	12	0.9300	1.97	1.63	3.44
EF10B Hydraulic/Pneumatic Flow Control	1/8	1/8-27 NPT	Brass	2000	3	0.2800	1.28	0.63	1.94
EF10S Hydraulic/Pneumatic Flow Control	1/8	1/8-27 NPT	Steel	5000	3	0.2800	1.28	0.63	1.94
EF20B Hydraulic/Pneumatic Flow Control	1/4	1/4-18 NPT	Brass	2000	6	0.5300	1.41	0.75	2.41
EF20S Hydraulic/Pneumatic Flow Control	1/4	1/4-18 NPT	Steel	5000	6	0.5300	1.41	0.75	2.41
EF30B Hydraulic/Pneumatic Flow Control	1/2	1/2-14 NPT	Brass	2000	12	0.9300	1.97	1.63	3.44
EF35B Hydraulic/Pneumatic Flow Control	3/4	3/4-14 NPT	Brass	2000	20	1.4300	2.19	1.38	3.75
EF35S Hydraulic/Pneumatic Flow Control	3/4	3/4-14 NPT	Steel	5000	20	1.4300	2.19	1.38	3.75

Product Questions & Answers (4)

Question by: Gary C on Oct 15, 2025, 6:48 PM

flow control on a brass valve like this -- does the setting actually hold once you got it where you want it, or does it drift around on you over time?

Answer by: Customer Support on Oct 17, 2025, 7:04 AM

Once you dial it in, the setting holds. There's a set screw built into the design that lets you lock the adjustment in place after you've got the flow where you need it. So if you're running a repeatable process and can't have that number creeping on you, just snug down the set screw and it stays put. The metal knob and stem are also a lot more durable than plastic alternatives, which helps keep things stable under regular use.

Question by: Ricky S on Jun 17, 2025, 6:30 PM

What's the deal with the color coding on this thing? What does it even mean?

Answer by: Customer Support on Jun 19, 2025, 8:01 AM

The color coding and numerical readouts are there to give you positive, precise, and repeatable settings. You can adjust it accurately within a small fraction of a turn, about one full turn per color.

Question by: Curt C on May 2, 2025, 3:28 PM

flow adjustment on this, can you actually change the setting while the system is still running under pressure, or do you have to shut it down first?

Answer by: Customer Support on May 4, 2025, 12:24 PM

You can make adjustments while the system is pressurized. The valve is built to allow flow changes under live pressure, which is a real convenience when you need to dial in a setting without taking the line down. Once you land on the right setting, the locking set screw holds it in place so it doesn't drift.

Question by: Glen D on Jul 30, 2025, 12:31 PM

trying to slow a cylinder down one way but let it come back fast, is that what this valve does?

Answer by: Customer Support on Aug 1, 2025, 9:44 AM

For that kind of motion control, it’s built to meter flow in one direction and allow free flow in the opposite direction. That lets you slow the actuator on the controlled stroke, then get an unrestricted return.