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Steel Inline Easy Read Flow Control Valve, Female 3/8-18 NPT Ports, Up to 10.00 GPM & 5000.00 PSI

Description & Features

The DELTROL Fluid Products steel inline easy read flow control valve is designed for controlled flow in one direction, allowing free flow in the opposite. With female 3/8-18 NPT ports, this valve operates at up to 10.00 GPM and 5000.00 PSI. Ideal for hydraulic systems, it ensures precise flow control with minimal adjustment.

Constructed from durable steel, the needle features stainless steel for longevity. The valve's color coding and numerical readout provide accurate, repeatable settings.

The metal knob and stem offer enhanced durability, and adjustments can be safely made under pressure. The valve includes a set screw for locking settings securely. The body material is available in brass, carbon steel, or stainless steel, and it utilizes Vitonreg; O-rings and Teflonreg; washer seals for superior performance.

Temperature range spans from -15deg;F to 200deg;F, making it versatile for various industrial applications. Flow control is efficient and reliable with a CV factor of 0.7600. Suitable for use in hydraulic systems, this valve withstands robust operational demands.

Supplier Part Number: EF25S

Specifications

Brand Deltrol Fluid Products	a Dimensions 1.63 in	Actuator Type Knob	Adjustment Without Adjustment	b Dimensions 1 in	Back-Up Washer PTFE	Body Material Steel	c Dimensions 2.88 in	Check Valve Without Check Valve	Color Silver	Connection Type FNPT	Dimensions 2-7/8 in L x 1 in W x 1-5/8 in H	Disc Material 440 Stainless Steel	Finish Anodized	Handle Material Aluminum	Lead-Free/Contains Lead Contains Lead	Mounting Type In-Line	Nominal Size 3/8 in	Number of Handles 1	Number of Ports/Ways 2	Operator Type Knob	Packing Material FKM	Seal Material FKM	Seat Material 440 Stainless Steel	Series eF Flow Control Series	Softgoods Material FKM/PTFE	Stem Material 416 Stainless Steel	Thread 3/8-18 NPT

Similar Products

Model Number	Size	Thread 1	Materials	Maximum Operating Pressure	Rated Flow	CV Factor	a Dimensions	b Dimensions	c Dimensions
EF25B Hydraulic/Pneumatic Flow Control	3/8	3/8-18 NPT	Brass	2000	10	0.7600	1.63 in	1 in	2.88 in
EF30S Hydraulic/Pneumatic Flow Control	1/2	1/2-14 NPT	Steel	5000	12	0.9300	1.97 in	1.63 in	3.44 in
EF10B Hydraulic/Pneumatic Flow Control	1/8	1/8-27 NPT	Brass	2000	3	0.2800	1.28 in	0.63 in	1.94 in
EF10S Hydraulic/Pneumatic Flow Control	1/8	1/8-27 NPT	Steel	5000	3	0.2800	1.28 in	0.63 in	1.94 in
EF20B Hydraulic/Pneumatic Flow Control	1/4	1/4-18 NPT	Brass	2000	6	0.5300	1.41 in	3/4 in	2.41 in
EF20S Hydraulic/Pneumatic Flow Control	1/4	1/4-18 NPT	Steel	5000	6	0.5300	1.41 in	3/4 in	2.41 in
EF30B Hydraulic/Pneumatic Flow Control	1/2	1/2-14 NPT	Brass	2000	12	0.9300	1.97 in	1.63 in	3.44 in
EF35B Hydraulic/Pneumatic Flow Control	3/4	3/4-14 NPT	Brass	2000	20	1.4300	2.19 in	1.38 in	3-3/4 in
EF35S Hydraulic/Pneumatic Flow Control	3/4	3/4-14 NPT	Steel	5000	20	1.4300	2.19 in	1.38 in	3-3/4 in

Product Questions & Answers (4)

Question by: Curt J on Jan 23, 2026, 9:09 AM

got a 3/8 npt line, is this valve the one with female 3/8-18 ports on both ends?

Answer by: Customer Support on Jan 24, 2026, 8:15 PM

It uses female 3/8-18 NPT ports and it is a 3/8 size inline valve, so it matches a 3/8-18 NPT male connection on each side.

Question by: Lance Y on Sep 24, 2025, 8:58 AM

What kind of pressures can this handle without giving out?

Answer by: Customer Support on Sep 26, 2025, 6:53 AM

This steel flow control valve is rated for pressures up to 5000 PSI in non-shock applications.

Question by: Darryl S on Jun 28, 2025, 6:38 AM

flow control valve rated for 5000 psi, does that hold up in actual hydraulic systems or is that more of a burst rating?

Answer by: Customer Support on Jun 29, 2025, 3:42 PM

For non-shock service, 5000 PSI is the rated operating pressure on this valve, not a burst figure. That means it's built for sustained hydraulic system use at that pressure level. The steel body and stainless steel needle are what make it suitable for hydraulic work, as opposed to the brass versions which are intended for pneumatic or lower-pressure applications. Just keep it out of high-shock pressure situations and you're well within what it's rated for.

Question by: Peggy J on Mar 13, 2026, 12:54 PM

What kind of systems does this flow control valve work best with?

Answer by: Customer Support on Mar 15, 2026, 6:06 AM

This steel valve is best for hydraulic systems. It can handle higher pressures than the brass versions, which are typically used for pneumatic setups.

Steel Inline Easy Read Flow Control Valve, Female 3/8-18 NPT Ports, Up to 10.00 GPM & 5000.00 PSI

Description & Features

Specifications

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Product Questions & Answers (4)