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

Type DC Diaphragm

General Description

Type DC Diaphragm

This style diaphragm is similar in function to the Type FC diaphragm, while the sealing and hardware designs are the same as the Type D.

 

Dimensions and Tolerances


Type DC Dimensions and Tolerances

 

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

.37-.99


9-25


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 ± 0.08


.017 ± .004


0.43 ± 0.10


.024 ± .004


0.61 ± 0.10


.035 ± .005


0.89 ± 0.13


.045 ± .007


1.14 ± 0.18

Wall Gauge
.015 ± .003


0.38 ± 0.08


0.17 ± .004


0.43 ± 0.08


.024 ± .004


0.61 ± 0.10


.035 ± .005


0.89 ± 0.13


.045 ± .007


1.14 ± 0.18

Flash Projection
.025 Max.


0.64 Max.


.025 Max.


0.64 Max.


.035 Max.


0.89 Max.


.040 Max.


1.02 Max.


.056 Max.


1.42 Max.

Flash Thickness
.025 Max.


0.64 Max.


.025 Max.


0.64 Max.


.035 Max.


0.89 Max.


.040 Max.


1.02 Max.


.056 Max.


1.42 Max.

Piston/Flange Radius
.031


.075 Max


.063


1.60 Max


.094


2.39


.125

3.18


.125


3.18

Flange Diameter
Cyl. Diam. + .313


Cyl. Diam. + 7.95


Cyl. Diam. + .500


Cyl. Diam. + .12.70


Cyl. Diam. + .750


Cyl. Diam. + 19.50


Cyl. Diam. + 1.000


Cyl. Diam. + 25.40


Cyl. Diam. + 1.000


Cyl. Diam. + 25.40

Bead Width
.094 ± .003


2.39 ± 0.08


.125 ± .003


3.18 ± 0.08


.187 ± .003


4.75 ± 0.08


.250 ± .003


6.35 ± 0.08


.250 ± .004


6.35 ± 0.10

Bead Height
.095 ± .004


2.41 ± 0.10


.135 ± .004


3.43 ± 0.10


.200 ± .005


5.08 ± 0.13


.270 ± .006


6.86 ± 0.15


.270 ± .008


6.86 ± 0.20

 

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


over 76.45


± .030


0.76


.030


0.76

Angular Relationship of holes: ± 1/2 degree.

 

Hardware Recommendations


TYpe DC Hardware Recommendations


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


Groove Width


.109


2.77


.141


3.58


.219


5.56


.281


7.14


.281


7.14


± .003


0.08 ±


Groove Height

.076


1.93


.105


2.67


.160


4.06


.224


5.69


.224


5.69


± .002


0.05 ±


Flange & Piston Corner Radii


.031


0.79


.063


1.60


.094


2.39


.125


3.18


.125


3.18


Lip Width


.062


1.57


.125


3.18


.187


4.75


.250


6.35


.250


6.35


± .003


0.08 ±


Lip Clearance

.021


0.53


.021


0.53


.031


0.79


.036


0.91


.048


1.22


± .003


0.08 ±

 

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)

DC-37-12


0.37


9


0.27


7


0.12


3


.017


0.43


.050


1.3


0.08


0.5


0.11


2.8


DC-62-10


0.62


16


0.50

13


0.10


3


.020


0.51


.060

1.5


0.25


1.6


0.07


1.8


DC-91-15


0.91


23


0.72


18


0.15


4


.020


0.51


.095


2.4


0.52


3.4


0.01


0.3


DC-125-15


1.25


32


1.05


27


0.15


4


.017


0.43


.100


2.5


1.04


6.7


0.08


2.0


DC-150-15


1.50


38


1.31


33


0.15


4


.017


0.43


.095


2.4


1.55


10.0


0.08


2.0


DC-175-15


1.75


44


1.56


40


0.15


4


.017


0.43


.095


2.4


2.15


13.9


0.08


2.0


*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.

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