The ULTRA-TROL^® is designed for applications requiring flanged end connections. The internal design features are similar to the HI-100 found on page 6. They include the in-line through ported, venturi flow shape and the contained spherical ball. The ball, cage and stem can easily be replaced in-line through the bottom cover without removing the valve from the line. The downstream seat is end loaded for quick replacement. Like the HI-100, the ULTRA-TROL^® can be used for various fluids including slurries in high or low temperature applications for refining, chemical, petrochemical and co-generating facilities.

The DFT® Model PDC® Silent Check Valve is specially designed for use on the discharge side of reciprocating air or gas compressors. It includes a pulse damping chamber to maintain the disc in the open position during the momentary reductions in flow associated with each cycle of a reciprocating compressor and to protect against premature seat wear.

The DFT® Excalibur® Silent Check Valve is a spring-assisted, center guided, in-line, check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, gasket, seat, spring, disc with stem and guide bushing. Excalibur® check valves are available in a wide range of sizes and pressure ratings and in a variety of metals to meet most check valve requirements.

The DFT® Model DLC® is a corrosion resistant, dependable, versatile and economical spring assisted, in-line check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the DLC® provides tight shut-off and protects other equipment in the system from water hammer. Its stainless steel construction insures a long service life.
Inconel® X-750 spring is standard

The FBC™ is a compact, lightweight, insert wafer check valve that easily installs between two flanges. The in-line, spring assisted design prevents "water hammer" and "reverse flow". The FBC™ contains all of the proven features of the Basic-Check® valve developed by DFT® over 60 years ago. Like the Basic-Check®, the metal-to-metal sealing area of the disc and seat is precision lapped providing tight shut-off for applications involving liquids, gases or steam. Resilient soft seats are available for applications requiring bubble-tight shut-off.

The HI-100 product line features an in-line, through-ported, venturi flow shape. The seating element, a ball, is contained by a cage that positions it relative to the downstream seat by means of linear stem travel. There are no close clearances between the moving parts (i.e. cage, ball, and seat). These basic features enable the valve design to operate smoothly and efficiently at high or low temperature, and/or with fluids containing foreign matter such as slurries. The HI-100 operates in the full open position, the throttling position and the closed position.

It is important to note that all valves have a guide pin. This pin is used only to position the ball for closing when there is insufficient flow to create an adequate pressure differential. When the valve is operating with a sufficient differential across the valve, the guide pin has no function.

The DFT® Model GLC® Silent Check Valve is a spring-assisted, center guided, in-line, flanged check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The valve consists of a body, seat, spring, disc with stem and guide bushing. Some valves have body or gasket seals. The DFT® GLC® check valve has the advantage of minimum pressure loss with silent, non-slam operation.

The DFT® Basic-Check® valve is a versatile all-purpose, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of liquids and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as reducing couplings, drain elbows, etc. to form a complete check valve unit ideally suited for a broad range of pipeline applications or incorporated into machinery for OEM applications. The metal-to-metal sealing area of the Basic-Check® valve’s disc and seat is precision lapped, providing very tight shut-off of both gas and liquid. If bubble-tight shut-off is required, resilient soft seats are available.

The DFT® Model SCV® is a corrosion resistant, dependable, versatile and economical spring-assisted, in-line check valve for a wide range of applications. Whether the fluid is liquid, gas or steam, the SCV® provides tight shut-off and protects other equipment in the system from water hammer. Its stainless steel construction insures a long service life.

The ALC® is an in-line, spring assisted, single guided "wafer" check valve designed to prevent "water hammer" and "reverse" flow. The lightweight compact design fits between mating flanges and meets API 594 Face-to-Face dimensions. The ALC® is an easy to maintain check valve for applications involving liquids, gases or steam. Tapped holes are provided in the body for lifting lugs to assist with installation. (10" & larger only)

The DFT® Model WLC Wafer style Silent Check Valve is a lightweight, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of fluids and pressure/temperature combinations. The joint between the seat ring and body is sealed by the flange gasket upon installation preventing any leakage through the joint when the valve is in service.
Size/Class

• 1", 1 1/2" - 150/300
• 2" to 8" - 150/300
• 10" - 150