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THREADED VALVES |
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SCV®
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VACUUM
BREAKER
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- 1/2” to 3”
Line size
- 750 & 3600 CWP
- NPT & SW ends
- 316 Stainless Steel Construction
- Inconel® X-750 spring
- Spring-assisted silent closing
- Zelon body “O” ring
- Horizontal or vertical installation
- Body guided disc
- Tight shut-off - lapped disc & seat
- Simplified construction - 5 parts
- Easy maintenance
- Versatile
The DFT SCV® model 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 316 stainless steel construction insures a long
service life. |
- 1" to 4 size
- 450 to 6000 CWP
- Threaded ends
- Unthreaded inlet bore
- Stainless Steel Construction
- Spring-assisted silent closing
- Horizontal or vertical installation
- Tight shut-off - lapped disc & seat
- Easy maintenance
- Versatile
The DFT Vacuum Breaker model provides effective protection
against collapse of pressure vessels, tanks and rolls.
They prevent condensate “back-up” when equipment is
shut down or inlet steam is reduced by modulating control
valves. In piping systems, DFT Vacuum Breakers are
used to break siphons, prevent pipe collapse during
transient pressure drops, and to provide addition of air
on the downstream side of check valves to dampen
water hammer. |
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RESTRICTOR VALVE
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BASIC CHECK®
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- Higher cracking pressure(2 to 40 psi)
- 1/4" to 2-1/2 Line size
- 450 to 2500 CWP
- Threaded ends
- Unthreaded inlet bore
- Stainless Steel Construction
- Spring-assisted silent closing
- Horizontal or vertical installation
- Tight shut-off - lapped disc & seat
- Easy maintenance
- Versatile
The DFT Restrictor Check Valve (RCV)
model is a
versatile, all-purpose, spring-assisted, in-line check valve for
applications that require higher cracking pressures to open the check
valve than those offered by other DFT check valves. Cracking
pressures are available from 2 to 40 psi. Like the Basic-Check® valve,
the Restrictor Check provides reliable, low maintenance service for a
wide range of fluids 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
couplings, drain elbows, etc. (not provided by DFT) to form a complete
check valve unit ideally suited for a broad range of applications. The RCV should not be considered a substitute for a Pressure Relief Valve.
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- 1/4" to 2-1/2 Line size
- 450 to 6000 CWP
- Threaded ends
- Stainless Steel Construction
- Spring-assisted silent closing
- Horizontal or vertical installation
- Tight shut-off - lapped disc & seat
- Easy maintenance
- Versatile
The DFT Basic-Check® valve model 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.
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WAFER VALVES |
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WLC®
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ALC®
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- Wafer design
- Lightweight
- Spring-assisted silent closing
- Edge guided (1” & 1-1/2”)
- Center guided (2” to 10”)
- Dual guided stem (2” to 10”)
- Horizontal or vertical installation
- Protected spring
- ANSI 150 to 2500
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1” to 10” Line Size
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WCB & 316 SS bodies
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316 SS trim
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Ends:
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Wafer RF
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Wafer RTJ
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MSS-SP 61 seat leakage
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API 594 Face-to-Face dimension:
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Class 600 RF
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Class 900/1500 RF
The DFT WLC® Wafer style Silent Check Valve model is a
lightweight, 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 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. |
- API 594 Face-to-Face dimensions
- Wafer RF ends
- Spring-assisted silent closing
- Sizes 10” thru 24”
- Horizontal or vertical installation
- ANSI Class 150 and 300
- Standard body materials:
- A216 WCB
- A351 CF8M
- Stainless steel seat, disc & bushing
- Inconel® X-750 spring
- Options
- Body materials:
* Alloy 20®
* Hastelloy®
* Others upon request
- 316 SS spring
- Custom sizing
- Soft seat
- Stellited trim
The DFT ALC®
is an in-line, spring assisted, center 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. |
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FLANGED VALVES |
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DLC®
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GLC®
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- ANSI B16.10 Face-to-Face dimensions
- Spring-assisted silent closing
- 1/2” to 3” Line size
- ANSI 150 and 300
- 316 Stainless Steel Construction
- Raised Face Flanged ends
- Inconel X-750 spring
- Electron beam welded body
- Meets B16.34 - 1988
- Horizontal or vertical installation
- Body guided disc
- Tight shut-off - lapped disc & seat
- Simplified construction - 3 parts
- Versatile
The DFT DLC® model 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 316 stainless steel construction insures a long
service life. |
- “Short” Face-to-Face dimensions
- One piece body
- Spring-assisted silent closing
- Center guided
- Dual guided stem
- Horizontal or vertical installation
- Protected spring
- Easy maintenance
- Versatile
- ANSI 150 To 2500
- 1” to 24” Line size
- WCB & 316 SS Bodies
- 316 SS trim
- RF Flanged Ends
- MSS-SP61 seat leakage
The DFT GLC® Silent Check Valve model 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. |
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EXCALIBUR®
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PDC®
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The DFT Excalibur® Silent Check Valve model 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. |
- Pulse damped design
- Modulating “air” or “gas” applications:
- discharge of reciprocating air/gas compressors
- self sizing
- accommodates varying flows without chattering
- Mediums:
- air
- gas
- ANSI B16.10 Face-to-Face dimensions
- One piece body
- Spring-assisted silent closing
- 2” to 12” Line size
- ANSI 150 to 1500
- WCB, 316 SS & LCC body
- 316 SS trim
- 316 SS spring (450°F max)
- Ends:
- RF Flanged
- RTJ
- Center guided
- Horizontal or vertical installation
- Tight shut-off
- Protected spring
- Easy maintenance
- Versatile
The DFT PDC® Silent Check Valve model 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. |
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