N/A
Unlined Metal
- Excellent Cv’s
- Complete Selection of End Connections
- ASTM Materials Include:
- Cast Iron ASTM A-126 Class B
- Ductile Iron ASTM A-395 Grade 60-40-18
- Cast Steel ASTM A-216 Grade WCB
- 316 Stainless Steel ASTM A-351 Grade CF8M
- 316L Stalinless Steel ASTM A-351 Grade CF3M
- Bronze ASTM B62 Alloy 836
- Alloy 20 ASTM A-351 Grade CN7M
- Hastelloy C ASTM A-494 Grade CW-6M
- Monel ASTM A-494 Grade M-35-1
- And More
Maximum temperature for all unlined configurations is 350°F (177°C) but may decrease depending on media, pressure and valve size.
Rubber Lined Bodies
- 1/8" Minimum Lining Thickness
- Ductile Iron or Cast Iron Available
- Full Flat Faced Flange Lining
- Excellent for Abrasive Applications
Lining Materials:
- Neoprene...A synthetic base elastomer with some physical properties
similar to natural rubber. Superior to natural rubber in resistance
to heat, ozone, sunlight and oil. Typical applications include:
phosphoric acids; magnesium oxide and sodium hydroxide.
Maximum temperature 200° F (93° C)
- Soft Rubber...Good resistance to most inorganic chemicals with
the exception of strong oxidizing agents. Exhibits outstanding
abrasion resistance. Typical applications include: gypsum, flyash,
titanium dioxide slurries and sewage.
Maximum temperature 180° F (82° C)
- Hard Rubber…Better chemical and heat resistance than soft
rubber. Wide application in organic and inorganic acids and
chlorine gas. Typical applications include: potable water; oxidizing
agents; plating solutions; salts; sludge and ferric chloride.
Maximum temperature 200° F (93° C)
- Hypalon…Good resistance to high concentrations of sulfuric and
nitric acids. Good heat, weather, ozone and abrasion resistance.
Other typical applications include: nickel plating solutions and ferric
chloride.
Maximum temperature 200° F (93° C)
- Chlorobutyl…Good heat resistance. Unaffected by cold weather
or rapid temperature changes. Typical applications include:
hydrofluoric acid, various zinc solutions and fertilizer solutions.
Maximum temperature 200° F (93° C)
Plastic Lined
- 3/16" Minimum Lining Thickness*
- Superior Flow Capabilities
- Line-Lok feature
- Wide Selection of Lining Materials
*Lining thickness of PFA is .14” minimum.
Line-lok is a unique feature of Dia-Flo diaphragm valves.
As can be seen by the drawing below, the weir area is
locked firmly to the body eliminating flexing of lining during
valve cycling, which can lead to premature liner failure.
Lining Materials:
PFA
- Excellent chemical resistance to all common solvents, superior high purity resistance,
excellent temperature resistance.
Maximum temperature 350° F (177° C)
ETFE (Tefzel)
- Suitable for strong acids and solvents. Compatible with a very broad range of
chemicals under a wide range of conditions.
Maximum temperature 300° F (149° C)
Note Tefzel is a registered trademark of E.I. DuPont de Nemours and Co. Inc.
Polypropylene
- Especially suitable for organic solvents degreasing agents, excellent resistance to
alkalines...economically priced, poor resistance to chlorinated solvents.
Maximum temperature 200°F (93° C)
PVDF
- Very good corrosion and chemical resistance, performs well in many applications at
elevated temperatures.
Maximum temperature 285° F (140° C)
PVC
- Very good corrosion and weather resistance…note that temperatures may be
restricted.
Maximum temperature 140° F (60° C)
Solid Plastic
- Lightweight and economical
- Excellent interior/exterior corrosion resistance
- Body materials include:
PVC (Polyvinyl chloride)
CPVC (Chlorinated polyvinyl chloride)
PVDF (Polyvinylidene fluoride)
Polypropylene
The body of the Dia-Flo plastic diaphragm valve is available in a variety of high-performance
engineered polymers including polyvinyl chloride (PVC), chlorinated polyvinyl chloride
(CPVC), polypropylene (PP), and natural polyvinylldene fluoride (PVDF).
The bonnet is manufactured from glass-reinforced polymers: either PP (polypropylene) or,
for high temperature service, PAS (polyarylsulfone). An optional PAS pneumatic actuator is
also available.
ANSI B16.10 Face-to-Face
Improve performance for Active Pharmaceutical Ingredients (API)
and chemical process customers by replacing ball and plug valves.
The Dia-Flo diaphragm valve with ANSI B16.10 face-face dimensions
offers all of the advantages of diaphragm valves and is a
direct replacement for ball and plug valves without the need for
piping modifications.
As with all other diaphragm valves this valve offers these clean
service benefits:
- Can be cleaned in place without disassembly or removal from
the pipeline;
- Has no cavities or pockets to trap process or cleaning fluids;
- Is available in FDA Compliant Materials;
- Is available with stainless steel exterior to eliminate
contamination potential from chipping paint;
- Can be steam sterilized
Also suitable for corrosive and abrasive applications the ANSI
face-to-face diaphragm valve offers:
- A smooth flow path for media resulting in less damage to the
valve body and diaphragm;
- No ball or plug to become damaged by abrasive media;
- A large sealing surface provided by the diaphragm;
- No cavities or pockets for process fluid to become trapped;
- Available sizes 1”, 11/2” and 2”
- Bodies available in - Stainless steel lined with PFA;
- Ductile iron lined with PFA
- Stainless steel unlined
- Bonnet assemblies available - Stainless steel or ductile iron, hand wheel operated or automatic operation
Diaphragm Materials
The diaphragm material and design are integral to the successful performance of the diaphragm valve. For that reason, 10 weir elastomer
diaphragms and 2 weir PTFE diaphragms are available to handle a multitude of process fluids and parameters.
Elastomer Diaphragms
Grade |
Material (FDA Compliant) |
Size |
Temperature |
Typical Services |
Grade B |
Black Butyl (FDA Compliant) |
½-12" |
-20 to 250°F (-29 to 121°C) |
Chemicals, gases, stronger acids |
Grade W1 |
White Butyl (FDA Compliant) |
½-6" |
0 to 225°F (-18 to 107°C) |
Foods, beverages, pharmaceuticals |
Grade 17 |
EPDM (FDA Compliant) |
½-8" |
-30 to 300°F (-34 to 149°C) |
Beverages, pharmaceuticals |
Grade M |
EPDM |
½-12" |
-30 to 300°F (-34 to 149°C) |
Chemicals, acids, hi-temp, abrasives |
Grade C |
Hypalon® CSM |
½-12" |
0 to 225°F (-18 to 107°C) |
OxidiIng fluids, oil resistant |
Grade S |
Natural Rubber |
½-8" |
-30 to 180°F (-34 to 82°C) |
Water, abrasives |
Grade T |
Neoprene® |
½-12" |
-20 to 200°F (-29 to 93°C) |
Weak chemicals, air, oil resistant |
Grade DP |
Buna N® NBR (FDA Compliant) Direct Loaded Valve only |
½-3" |
10 to 180°F (-12 to 82°C) |
For direct load valve only |
Grade P |
Buna N® NBR (FDA Compliant) |
½-12" |
+10 to 180°F (-12 to 82°C) |
Foods, oils |
Grade V |
Viton® FKM |
½-6" |
-20 to 325°F (-29 to 163°C) |
Specific solvents & chemicals, oils |
Our elastomer diaphragms are available in a variety of materials
to address various process characteristics. Some elastomer
diaphragms are softer and better suited to abrasive and slurry
applications. Others are harder, providing greater chemical
resistivity and higher temperature limitations. All elastomer
diaphragms in sizes 1" - 8" are molded in the closed position to
provide the most effective seal. Each diaphragm contains markings
identifying the size, material, mold date and diaphragm supplier.
-
The molded closed design increases the sealing properties of the
diaphragm. The relaxed position of the diaphragm is contoured to
the same shape as the weir which increases the ability of the
diaphragm to provide a bubble-tight shut-off.
Due to diaphragm area limitations, sizes smaller than 1” are molded
open.
Diaphragm Traceability
All diaphragm materials and physical properties are batch traceable via permanent codes molded into the diaphragm tabs. The molding
date, material type, and diaphragm size provide traceability to original batch records.
PTFE Diaphragms
Grade |
Material (FDA Compliant) |
Size |
Temperature |
Grade TM |
Modified PTFE (FDA Compliant) |
½-6" |
-30 to 350°F (-34-177°C) |
Grade R2 |
PTFE (FDA Compliant) |
8"-10" |
-30 to 350°F (-34-177°C) |
The two-piece PTFE (Polytetrafluoroethylene) diaphragm assembly utilized in
the Dia-Flo diaphragm valve has proven through years of outstanding service
to be the best design available. The two-piece construction, consisting of PTFE
diaphragm and ethylene propylene elastomer backing cushion, fully eliminates
the problem of delamination permeational cracking common to competitive
“PTFE-faced” designs.
To ensure the best possible diaphragm, ITT maintains a continuing
development program to utilize new materials and improve existing
compounds. The result of this effort is the recent introduction of the PTFE
grade TM diaphragm (1/2-6”).
Proven benefits of the PTFE grade TM diaphragm versus conventional PTFE
diaphragms are:
- Reduced permeation due to a more homogeneous microstructure with
minimal voids
- Reduced cold flow similar to 25% carbon reinforced PTFE
- Increased cycle life due to a more amorphous compound
FLOATING TUBE NUT
The floating tube nut feature contributes
largely to the successful operation of
plastic diaphragms in Dia-Flo diaphragm
valves. The downward force of the stem
is transferred to the compressor, by-passing
the tube nut. The result is that forces
are evenly distributed over the seating
area of the diaphragm, thus reducing
cold flow and stud pull out
concerns. This design is also used on 6"
and larger elastomer diaphragms.
Manual Bonnet Assemblies
Dia-Flo diaphragm valve bonnet assemblies are equipped
as standard with:
- Bronze Stem Bushing
- Molded-in Fingers*
- Grease Fitting** (6-12”)
- Thrust Bearing Visual Position Indication
- Adjustable Travel Stop (1/2-4”)
- Permanently Sealed Lubrication (1/2-4”)
- Clear Stem Cover (1/2-4”)
*In conjunction with the compressor, the fingers positively support
the diaphragm from the closed to open position. The diaphragm is
lifted high when the valve is opened and is pressed tightly against
the weir when the valve is closed. It is supported in all positions by
alternate fingers of the compressor and bonnet. Fingerplates in
place of molded in fingers are utilized in 3” through 6” stainless
steel bonnet assemblies.
** Not used with sealed bonnet
|