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.

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.

Reverse flow can begin almost immediately as pump flow decays after shutdown. During this transition, fluid inertia may ...
04/30/2026

Reverse flow can begin almost immediately as pump flow decays after shutdown. During this transition, fluid inertia may drive flow backward before a valve has fully closed.

If closure is delayed, this reversal can create pressure spikes, vibration, and mechanical stress throughout the discharge system — contributing to long-term wear in piping and equipment.

DFT check valves are designed with closure behavior in mind, helping systems respond earlier and reduce the impact of reverse flow events.

Reliability over time starts with engineered valve design.The true cost of a check valve isn’t measured at installation,...
04/28/2026

Reliability over time starts with engineered valve design.

The true cost of a check valve isn’t measured at installation, it’s revealed over years of operation. Maintenance frequency, replacement cycles, and unplanned shutdowns all play a major role in long-term system costs.

DFT engineered check valves are designed for durability, tight closure, and consistent performance under real operating conditions. Compared to commodity valves, this approach helps reduce maintenance demands, extend service life, and minimize disruptions that impact uptime and operating budgets.

Designing for reliability leads to more predictable lifecycle costs and longer overall system life.

Maintenance teams often focus on wear points like seals, bearings, and rotating equipment. However, valve behavior can a...
04/21/2026

Maintenance teams often focus on wear points like seals, bearings, and rotating equipment. However, valve behavior can also influence how frequently maintenance is required in piping systems.

When check valves slam or allow repeated reverse flow events, the resulting vibration and pressure spikes can accelerate wear across the system. Over time, this leads to more inspections and more frequent component replacements.

DFT spring‑assisted check valves are designed to close before reverse flow develops, helping to limit pressure transients and reduce stress on piping systems.

Pump discharge systems rely on stable flow conditions to protect both equipment and piping infrastructure. When reverse ...
04/16/2026

Pump discharge systems rely on stable flow conditions to protect both equipment and piping infrastructure. When reverse flow occurs after pump shutdown, uncontrolled valve closure can create pressure surges that place stress on seals, bearings, and piping supports.

Check valves installed in discharge lines act as a safeguard, preventing fluid from reversing direction and impacting pump components.

Selecting a spring assisted DFT check Valve helps protect rotating equipment and reduce the mechanical loads that contribute to premature wear.

In compressor and gas handling systems, rapid pressure changes and fluctuating flow conditions can challenge traditional...
04/07/2026

In compressor and gas handling systems, rapid pressure changes and fluctuating flow conditions can challenge traditional check valve designs. Valves that rely on gravity or reverse flow to close may create vibration and pressure disturbances when they shut abruptly.

Spring-assisted non-slam check valves are designed to close in a more controlled way. By applying mechanical force to the disc, they can respond earlier as forward flow decreases, helping reduce the likelihood of valve slam.

This controlled closure helps protect compressors, reduce vibration in piping systems, and support more stable flow performance during changing operating conditions.

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

https://twitter.com/#!/DFTValves, http://www.facebook.com/pages/DFT-Valves/255252777885250,

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