DFT Inc. - Check & Control Valve Manufacturer

DFT Inc. - Check & Control Valve Manufacturer DFT Inc. manufactures world class, problem solving, in-line, axial flow, nozzle style silent check valves and severe service control valves.

Keep up-to-date on the latest at DFT:
https://www.dft-valves.com/blog/ Whether it is "in stock", or a "custom engineered, special order", the DFT® sales and engineering staff will respond quickly to your requirements. DFT® is the only company that specializes in a broad spectrum of spring assisted, in-line silent check valves with materials ranging from ductile iron to exotic alloys, and are Made in America.

Reciprocating compressors produce pressure fluctuations on every stroke. A standard check valve wasn't designed to handl...
09/01/2026

Reciprocating compressors produce pressure fluctuations on every stroke. A standard check valve wasn't designed to handle that.

Each compressor cycle creates a momentary flow reduction, enough to move a conventional valve disc toward the seat, accelerating wear with every cycle. In high-cycle applications, that compounds fast.

The DFT PDC Silent Check Valve's pulse damping chamber keeps the disc open through each flow reduction, protecting the seat and extending service life across the compressor's full operating range.

Built specifically for reciprocating air and gas compressor discharge, not adapted from a general-purpose design.

Water hammer is a pressure surge, and it's more damaging than most teams realize until something fails.The shockwaves it...
07/09/2026

Water hammer is a pressure surge, and it's more damaging than most teams realize until something fails.

The shockwaves it generates can reach ten times normal system pressure, causing cumulative damage to valves, joints, and piping over time. Check valve type is often a direct contributing factor.

Spring-assisted check valves close before flow reversal occurs. Gravity-dependent designs wait for that reversal, and that's what creates the shockwave.

Learn more: https://hubs.la/Q04nqdrm0

Happy Independence Day from the DFT team.Wishing you a safe and enjoyable Fourth of July!
07/04/2026

Happy Independence Day from the DFT team.

Wishing you a safe and enjoyable Fourth of July!

Compressor systems are sensitive to pressure fluctuations caused by rapid changes in flow conditions. When check valves ...
06/18/2026

Compressor systems are sensitive to pressure fluctuations caused by rapid changes in flow conditions. When check valves rely on reverse flow to close, the resulting impact can introduce vibration and stress in both the compressor and downstream piping.

Closure timing plays a key role in how these systems respond during transient events. Early closure helps limit pressure disturbances and reduce mechanical loading.

DFT spring-assisted check valves are designed to initiate closure as forward flow decreases, protecting the compressor, supporting stable operation, and consistent flow control in gas systems.

Flow path design plays a key role in how fluid moves through a valve and how the system responds during changing conditi...
06/11/2026

Flow path design plays a key role in how fluid moves through a valve and how the system responds during changing conditions. Axial-flow check valves align with the direction of flow, helping reduce turbulence and maintain more consistent pressure profiles.

This design also supports and enables faster closure, which is important in systems where pressure fluctuations can affect performance. By minimizing disruption to flow, axial-flow designs help maintain stability across a range of operating conditions.

DFT axial-flow check valves are engineered with these principles in mind, supporting reliable performance in pipeline and process applications.

When a pump shuts down, flow doesn’t stop immediately. As velocity decays, fluid inertia can create pressure transients ...
06/03/2026

When a pump shuts down, flow doesn’t stop immediately. As velocity decays, fluid inertia can create pressure transients that introduce vibration and mechanical stress across the system.

Check valve response during this phase plays a key role in system stability. Delayed closure allows reverse flow to develop, increasing the intensity of pressure spikes.

DFT check valves are designed to respond earlier in the flow cycle, helping manage these conditions and support more stable operation.

Reverse flow can begin almost immediately after a pump shuts down or flow is interrupted. If a check valve closes too sl...
05/27/2026

Reverse flow can begin almost immediately after a pump shuts down or flow is interrupted. If a check valve closes too slowly, returning fluid can drive the disc back into the seat, creating vibration, pressure spikes, and mechanical stress throughout the system.

Spring-assisted check valves are designed to respond quickly as forward flow decreases. By closing before reverse flow develops, they help stabilize fluid systems and reduce pressure transients that affect downstream piping.

DFT spring-assisted check valves help protect equipment and support more stable system operation over time.

Today, we pause to honor and remember those who gave their lives in service.Memorial Day is a time to reflect on their s...
05/25/2026

Today, we pause to honor and remember those who gave their lives in service.

Memorial Day is a time to reflect on their sacrifice and recognize the commitment and courage of those who have served.

In systems with fluctuating flow conditions, relying on reverse flow to close a valve can introduce instability. Traditi...
05/21/2026

In systems with fluctuating flow conditions, relying on reverse flow to close a valve can introduce instability. Traditional designs may remain open until flow reversal forces closure, creating impact, vibration, and pressure disturbances.

DFT’s spring-assisted check valves are designed to begin closing as forward flow decreases. This earlier response helps reduce the likelihood of valve slam and supports more stable pressure conditions.

Check valve performance depends on more than pressure rating and line size. Closure behavior, pressure dynamics, and ins...
05/19/2026

Check valve performance depends on more than pressure rating and line size. Closure behavior, pressure dynamics, and installation conditions all influence how a valve interacts with the system.

Engineered designs take these factors into account to support stable operation across changing flow conditions. This helps reduce system stress, protect equipment, and maintain consistent performance over time.

At DFT, these system‑level considerations guide how we approach check valve selection and sizing, helping align valve performance with real operating conditions. Ask us about check valve sizing and application support.

Address

140 Sheree Boulevard PO Box 566
Exton, PA
19341

Opening Hours

Monday 8:30am - 5pm
Tuesday 8:30am - 5pm
Wednesday 8:30am - 5pm
Thursday 8:30am - 5pm
Friday 8:30am - 5pm
Saturday 8:30am - 5pm

Telephone

(610) 363-8903

Website

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