Seals, Actuated, Air, Diaphragm, Pump, Valve, O Ring, Compressor, Seal, Viton, High Pressure, Actuator

 

Composite Diaphragms, High Strength Seal, Inserted Diaphragms, Pneumatic Actuated Diaphragm Valves, Top Hat Diaphragms

Type F "Top Hat" Diaphragm

General Description

Type F Diaphragm The Type F is commonly referred to as the “top hat” diaphragm. It exhibits all of the benefits that are associated with rolling diaphragms. These diaphragms have the longest stroke-to-bore ratio, zero spring rate, no breakaway friction, constant effective pressure area, and long life. Some of the drawbacks to Type F diaphragms are additional assembly time required when inverting the top head corner radius during installation, and an inability to withstand reverse pressure.

The flange of the Type F diaphragm is designed to seal like a gasket between the two flat surfaces of the cylinder and bonnet. The outside edge and bolt holes can be cut into any configuration desired. An effective seal should be obtained by compressing the flange area 20-25% thickness.

To extend cycle life and reduce “four-cornering” of the diaphragm, a double taper design may be utilized (see Figure 1). This design reduces the diameter of the bottom end of the diaphragm which minimizes excess material in this area and relieves circumferential compressive stress.


Type F Figure 1
Type F Figure 2

Dimensions and Tolerances


Inches mm Inches mm Inches mm Inches mm Inches mm
Cylinder Diameter

.25-.99


6-25


1.00-2.50


25-64


2.51-4.00


64-102


4.01-8.00


102-205


8.01 & up


205 & up

Height
See available sizes table

Cylinder Diameter
Tolerances on Cylinder Diameter and Piston Diameter are ± 0.010" per inch (0.254 mm) of diameter but the tolerance will be no less than ± 0.010" (0.254 mm) or greater than ± 0.060" (1.52 mm)

Piston Diameter
Head & Flange Thickness
.015 ± .003


0.38 ± .08


.017 ± .004


0.43 ± 0.10


.024 ± .004


0.61 ± .10


.035 ± .005


0.89 ± 0.13


.045 ± .007


1.14 ± 0.18

Wall Gauge
.015 ± .003


0.38 ± 0.08


.017 ± .004


0.43 ± 0.08


.024 ± .004


0.61 ± 0.10


.035 ± .005


0.89 ± 0.13


.045 ± .007


1.14 ± 0.18

Piston Radius
.094


1.39


.125


3.18


.156


3.96


.250


6.35


.250


6.35

Flange Radius
.031


0.79


.063


1.60


.094


2.39


.125


3.18


.125


3.18

Flange Diameter
Cyl. Diam. ± .750


Cyl. Diam. ± 19.05


Cyl. Diam. ± 1.000


Cyl. Diam. ± 25.40


Cyl. Diam. ± 1.500


Cyl. Diam. + 38.10


Cyl. Diam. ± 2.000


Cyl. Diam. ± 50.80


Cyl. Diam. ± 2.000


Cyl. Diam. ± 50.80

 

Diaphragm Flange Diameter and Hole Trim Tolerance
Diameter Size Position
(Inches) (mm) (Inches) (mm) (Inches) (mm)

0-1.00


.0-25.40


± .010


0.25


.010


0.25


1.01-3.00


25.65-76.20


± .020


0.51


.020


0.51


over 3.01


76.45


± .030


0.76


.030


0.76

 

Hole Spacing for Type F Diaphragms


Type F Figure 3

Max. Working Pressure (P.S.I.)/KPA
(0-50)


0-350


(51-150)


357-1050


(151-300)


1057-2100


(301-500)


2107-3500

Seal Area Minimum Inches/mm
.100


2.54


.150


3.81


.200


5.08


.250


6.35

 

Hole Spacing


Perforations through the head or the flange should be located so that there is at least 0.100 inches (2.54 mm) minimum between the edges of holes. Also, holes should be located so that there is at least 0.125 inches (3.175 mm) between the edges of a hole and the trim periphery. It is also important to arrange the hole pattern so that the radial distance from the edge of the hole to the start of the blend radius at either the piston head or cylinder clamp flange is at least as far as indicated in the chart above.

Available Sizes


Dia•Com
Part No.
Cylinder
Diameter
Piston
Diameter
Height
Gauge
Approx.
Convolution
Width
Effective
Pressure
Area
Maximum
Half-Stroke
(Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) * (Inches) (mm)

F-34-39


0.34


9


0.22


6


0.39


10


.015


0.38


.060


1.5


0.06


0.4


0.17


4.3


F-37-31


0.37


9


0.25


6


0.31


8


.015


0.38


.060


1.5


0.08


0.5


0.09


2.3


F-44-44


0.44


11


0.31


8


0.44


11


.015


0.38


.065


1.7


0.11


0.7


0.21


5.3


F-62-50


0.62


16


0.50


13


0.50


13


.015


0.38


.060


1.5


0.25


1.6


0.28


7.1


F-62-65


0.62


16


0.47


12


0.65


17


.024


0.61


.075


1.9


0.23


1.5


0.47


11.9


F-75-38


0.75


19


0.62


16


0.38


10


.010


0.25


.065


1.7


0.37


2.4


0.12


3.0


F-75-62


0.75


19


0.62


16


0.62


16


.011


0.28


.065


1.7


0.37


2.4


0.36


9.1


F-75-62


0.75


19


0.62


16


0.62


16


.015


0.38


.065


1.7


0.52


3.4


0.36


9.1


F-89-58


0.89


23


0.71


18


0.58


15


.015


0.38


.090


2.3


0.50


3.3


0.21


5.3


F-100-44


1.00


25


0.81


21


0.44


11


.010


0.25


.095


2.4


0.64


4.1


0.06


1.5


F-100-62


1.00


25


0.81


21


0.62


16


.017


0.43


.095


2.4


0.64


4.1


0.24


6.1


F-100-100


1.00


25


0.81


21


1.00


25


.017


0.43


.095


2.4


0.64


4.1


0.62


15.7


F-112-44


1.12


28


0.94


24


0.44


11


.017


0.43


.090


2.3


0.83


5.4


0.07


1.8


F-112-69


1.12


28


0.94


24


0.69


18


.017


0.43


.090


2.3


0.83


5.4


0.32


8.1


F-118-53


1.18


30


0.97


25


0.53


13


.017


0.43


.105


2.7


1.30


8.3


0.22


5.6


F-137-112


1.37


35


1.19


30


1.12


28


.017


0.43


.090


2.3


1.29


8.3


0.75


19.1


F-150-62


1.50


38


1.31


33


0.62


16


.017


0.43


.095


2.4


1.55


10.0


0.24


6.1


F-150-75


1.50


38


1.31


33


0.50


13


.017


0.43


.095


2.4


1.55


10.0


0.37


9.4


F-150-94


1.50


38


1.31


33


0.94


24


.020


0.51


.095


2.4


1.55


10.0


0.56


14.2


F-156-141


1.56


38


1.38


35


1.41


36


.017


0.43


.060


1.5


1.63


10.5


1.04


26.4


F-162-44


1.62


41


1.47


37


0.44


11


.017


0.43


.090


2.3


1.84


11.9


0.07


1.8


F-162-46


1.62


41


1.47


37


0.46


12


.020


0.51


.075


1.9


2.26


12.1


0.07


1.8


F-162-69


1.62


41


1.44


37


0.69


18


.017


0.43


.090


2.3


1.84


11.9


0.32


8.1


F-175-106


1.75


44


1.56


40


1.06


27


.017


0.43


.095


2.4


2.15


13.9


0.68


17.3


F-175-175


1.75


44


1.56


40


1.75


44


.015


0.38


.095


2.4


2.15


13.9


1.37


34.8


F-200-75


2.00


51


1.81


46


0.75


19


.017


0.43


.095


2.4


2.85


18.4


0.37


9.4


F-200-100


2.00


51


1.81


46


1.00


25


.016


0.41


.095


2.4


2.85


18.4


0.62


15.7


F-200-162


2.00


51


1.81


46


1.62


41


.017


0.43


.095


2.4


2.85


18.4


1.24


31.5


F-200-200


2.00


51


1.81


46


2.00


51


.017


0.43


.095


2.4


2.85


18.4


1.62


41.1


F-212-131


2.12


54


1.94


49


1.31


33


.017


0.43


.090


2.3


3.23


20.9


0.94


23.9


F-225-62


2.25


57


2.06


52


0.62


16


.020


0.43


.095


2.4


3.65


23.5


0.26


6.6


F-225-94


2.25


57


2.06


52


0.94


24


.017


0.43


.095


2.4


3.65


23.5


0.56


14.2


F-225-137


2.25


57


2.06


52


1.37


35


.017


0.43


.095


2.4


3.65


23.5


0.99


25.1


F-250-142


2.50


64


2.31


59


1.42


36


.017


0.43


.095


2.4


4.54


29.3


1.04


26.4


F-250-150


2.50


64


2.31


59


1.50


38


.017


0.43


.095


2.4


4.54


29.3


1.12


28.4


F-250-153


2.50


64


2.00


51


1.53


39


0.18


0.46


.250


6.4


3.97


25.6


1.10


27.9


F-275-112


2.75


70


2.44


62


1.12


28


.024


0.61


.155


3.9


6.62


34.1


0.57


14.5


F-300-119


3.00


76


2.69


68


1.19


30


.030


0.76


.155


3.9


6.35


41.0


0.64


16.3


F-300-300


3.00


76


2.69


68


3.00


76

.024


0.61


.155


3.9


6.35


41.0


2.42


61.5


F-319-100


3.19


81


2.88


73


1.00


25


.024


0.61


.155


3.9


8.78


46.7


0.45


11.4


F-325-131


3.25


83


2.94


75


1.31


33


.024


0.61


.155


3.9


7.52


48.5


0.76


19.3


F-328-148


3.28


83


2.75


70


1.48


38


.017


0.43


.265


6.7


7.14


46


0.76


19.3


F-350-212


3.50


89


3.18


81


2.12


54


.030


0.76


.160


4.1


8.76


56.5


1.72


43.7


F-375-132


3.75


95


3.44


87


1.32


34


.022


0.56


.155


3.9


10.15


65.5


0.77


19.6


F-375-225


3.75


95


3.44


87


2.25


57


.024


0.61


.155


3.9


10.15


65.5


1.70


43.2


F-400-400


4.00


102


3.69


94


4.00


102


.024


0.61


.155


3.9


11.61


74.9


3.49


87.6


F-402-154


4.02


102


3.70


94


1.54


39


.032


0.81


.160


4.1


11.70


75.5


0.88


22.4


F-450-275


4.50


114


4.00


102


2.75


70


.035


0.89


.250


6.4


14.18


91.5


1.97


50.0


F-460-450


4.60


117


4.00


102


4.50


114


.040


1.02


.300


7.6


14.51


93.6


3.6


91.4


F-475-82


4.75


121


4.37


111


0.82


21


.035


0.89


.190


4.8


16.32


105.3


0.10


2.5


F-475-187


4.75


121


4.27


108


1.87


47


.035


0.89


.240


6.1


15.97


103.0


1.09


27.7


F-500-300


5.00


127


4.50


114


3.00


76


.035


0.89


.250


6.4


17.71


114.3


2.22


56.4


F-531-256


5.31


135


4.13


105


2.56


65


.039


0.99


.590


15


17.49


112.8


1.35


34.3


F-550-175


5.50


140


5.00


127


1.75


44


.035


0.89


.250


6.3


21.64


139.6


0.97


24.6


F-550-337


5.50


140


5.00


127


3.37


86


.035


0.89


.250


6.3


21.64


139.6


2.59


65.8


F-600-513


6.00


152


5.50


140


5.13


130


.040


1.02


.250


6.3


30.66


167.4


4.35


110.5


F-675-232


6.75


171


6.25


159


2.32


59


.035


0.89


.250


6.3


33.17


214.03


1.54


39.1


F-750-150


7.50


191


7.00


178


1.50


38


.035


0.89


.250


6.4


41.26


266.2


0.72


18.3


F-800-400


8.00


203


7.50


191


4.00


102


.035


0.89


.250


6.3


47.15


304.2


3.22


81.8


F-1000-200


10.00


254


9.25


235


2.00


51


.050


1.27


.375


9.5


72.72


469.2


1.02


25.9


F-1000-225


10.00


254


9.50


241


2.25


57


.035


0.89


.250


6.4


74.62


481.4


1.47


37.3


F-1000-412


10.00


254


9.50


241


4.12


105


.040


1.02


.250


6.4


82.47


481.4


3.34


84.8


F-1188-538


11.88


302


11.38


289


5.38


137


.040


1.02


.250


6.3


106.18


685.0


4.60


116.8


*Metric effective pressure area shown in square centimeters.

 

 

 

 

 

Dia•Com is a leading international provider of innovative, cost-effective molded diaphragm solutions critical to the operation of essential systems and equipment in industrial, automotive, aerospace, medical instrumentation, and food and water processing applications. The company's reputation for excellence is based on superior quality in the design, manufacture and application of its high-performance, state-of-the-art, fabric-reinforced and homogeneous elastomeric rubber seals. Our custom engineered solutions are found in many products today, including diaphragm pumps, rubber seals, pneumatic diaphragm pumps, high pressure diaphragm pumps, viton gaskets, diaphragm carburetor, diaphragm pressure gauges, diaphragm vacuum pumps, diaphragm air compressors, diaphgram fuel pumps and diaphragm metering pumps.

Type P Diaphragm | Type F Diaphragm | Type FC Diaphragm | Type D Diaphragm
Type DC Diaphragm | Type O and Type OA Diaphragms | Type OB Diaphragm

about products | rubber to metal bonding | elastomeric teflon diaphragms | general hardware | diaphragm life design
bead and groove design | standard diaphragms | fabric reinforced diaphragms | homogeneous diaphragms
fab•air industrial diaphragms

home | diaphragm products | elastomer & fabric diaphragm data | diaphragm engineering | diaphragm markets
diaphragm software | about | quality | download catalog | news & events | contact | diaphragm glossary | inquiry | sitemap

Diagram of Seals, Actuated, Air, Diaphragm, Pump, Valve, O Ring, Compressor, Seal, Viton, High Pressure, Actuator, Rubber Seal, Diaphragm Pumps, Diaphragm Valve, Fluorosilicone, Rubber Seals.
web page design