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Pneumatic Diaphragm Valve

Pneumatic diaphragm valves use a pneumatic actuator to control the opening and closing of the valve diaphragm. They can be optionally equipped with intelligent controllers such as the C-TOP, positioners like the IL-TOP, and position feedback devices such as the F-TOP, thereby meeting a wide range of automated control requirements.
Technical Specifications
Specifications: 1"-4", DN25-DN100
Pressure: 10 bar (145 PSI)
Material: ASTM 316L, 1.4404, 1.4435 NB2 Fe < 0.5%
Temperature: -20°C to 150°C (depending on diaphragm material)
Connections: Quick-Connect, Welding, Threaded; 3A, BPE, DIN, SMS, IDF, ISO
Valve body configurations: straight-through, three-way, U-shaped three-way, tank-bottom valve, and multi-port diaphragm valve.
Diaphragm materials: EPDM+PTFE (double-layer)/EPDM/Silicone/FPM (Viton)
Valve body type: cast, forged

Category:

Diaphragm valve

Pneumatic diaphragm valves use a pneumatic actuator to control the opening and closing of the valve diaphragm. They can be optionally equipped with intelligent controllers such as the C-TOP, positioners like the IL-TOP, and position feedback devices such as the F-TOP, thereby meeting a wide range of automated control requirements.
Technical Specifications
Specifications: 1"-4", DN25-DN100
Pressure: 10 bar (145 PSI)
Material: ASTM 316L, 1.4404, 1.4435 NB2 Fe < 0.5%
Temperature: -20°C to 150°C (depending on diaphragm material)
Connections: Quick-Connect, Welding, Threaded; 3A, BPE, DIN, SMS, IDF, ISO
Valve body configurations: straight-through, three-way, U-shaped three-way, tank-bottom valve, and multi-port diaphragm valve.
Diaphragm materials: EPDM+PTFE (double-layer)/EPDM/Silicone/FPM (Viton)
Valve body type: cast, forged
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Product Description

>The valve body is precision-machined using CNC technology, ensuring perfect alignment between the sealing surface of the valve chamber and the curvature of the diaphragm, thereby reducing diaphragm friction and extending its service life. 
>Valve cavity surfaces may be mechanically or electrolytically polished according to customer requirements, with a surface finish achievable down to 0.25 μm. 
Diaphragms made of flexible, elastomeric materials do not exhibit sensitive reactions when exposed to process media contaminated with fibrous clumps, solid particles, catalysts, or other impurities. In general, such contamination does not adversely affect valve operation or sealing performance. Depending on the operating or sterilization temperature and the chemical characteristics of the process medium, different materials can be selected.

Given that different valve types and materials are selected for different operating conditions, it is essential to conduct a thorough application analysis for each product prior to selecting the valve body and diaphragm—particularly in chemical and pharmaceutical applications, as well as in scenarios involving high temperatures that may trigger chemical reactions. The suitability of the material must be verified through reliable chemical data or expert certification to ensure the product’s safety and long-term performance.

A typical method for securing a diaphragm is screw fixation. In contrast to aperture-based fixation, this approach distributes the load over the entire surface of the bolt, thereby preventing mechanical failure of the diaphragm under vacuum conditions.

Size of diaphragm

Actuator

A

B

C

D

d

K

N

PTFE

EPDM

Operating

SIP

Operating

SIP

Pressure

Temperature

Pressure

Temperature

DN10

22

22

32

32

4.5

 

4

6bar

maximum

150°C

10bar

maximum

130°C

DN15

39

44

49

54

6

M5

4

6bar

maximum

150°C

10bar

maximum

130°C

DN25

54

46

72

57

9

1/4"-20UNC

4

6bar

maximum

150°C

10bar

maximum

130°C

DN40

70

65

100

90

11

1/4"-20UNC

4

6bar

maximum

150°C

10bar

maximum

130°C

DN50

82

78

133

105

13

1/4"-20UNC

4

6bar

maximum

150°C

10bar

maximum

130°C

DN65

102

95

145

133

13

M8

4

6bar

maximum

150°C

10bar

maximum

130°C

DN80

127

114

175

156

18

M8

4

6bar

maximum

150°C

10bar

maximum

130°C

Key words:

Pneumatic Diaphragm Valve

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Pneumatic Diaphragm Valve

Pneumatic diaphragm valves use a pneumatic actuator to control the opening and closing of the valve diaphragm. They can be optionally equipped with intelligent controllers such as the C-TOP, positioners like the IL-TOP, and position feedback devices such as the F-TOP, thereby meeting a wide range of automated control requirements.
Technical Specifications
Specifications: 1"-4", DN25-DN100
Pressure: 10 bar (145 PSI)
Material: ASTM 316L, 1.4404, 1.4435 NB2 Fe < 0.5%
Temperature: -20°C to 150°C (depending on diaphragm material)
Connections: Quick-Connect, Welding, Threaded; 3A, BPE, DIN, SMS, IDF, ISO
Valve body configurations: straight-through, three-way, U-shaped three-way, tank-bottom valve, and multi-port diaphragm valve.
Diaphragm materials: EPDM+PTFE (double-layer)/EPDM/Silicone/FPM (Viton)
Valve body type: cast, forged
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