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.
RESTRICTOR VALVE
BASIC CHECK®
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.
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.
ANSI 150 to 2500
-
1” to 10” Line Size
-
WCB & 316 SS bodies
-
316 SS trim
-
Ends:
*
Wafer RF
*
Wafer RTJ
-
MSS-SP 61 seat leakage
-
API 594 Face-to-Face dimension:
*
Class 600 RF
*
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.
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.
EXCALIBUR®
PDC®
ANSI B16.10 Face-to-Face dimensions
Spring-assisted silent closing
2” to 24” Line size
ANSI 150 to 1500
WCB & 316 SS bodies
316 SS trim
Ends:
- RF Flanged
- RTJ
Center guided
Dual guided stem
Horizontal or vertical installation
Tight shut-off
Two piece body
Protected spring
Body gaskets
Easy maintenance
Versatile
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.
