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Diaphragm valve at the bottom of the tank

Technical Specifications
Pneumatic diaphragm valves for tank bottoms are used for venting and draining process media in pharmaceutical tank equipment.
SIZE: 1"-4", DN25-DN100
Maximum temperature: -20 to 150°C (depending on the diaphragm) (stainless steel actuator)
Maximum temperature: -20 to 130°C (depending on the diaphragm) (plastic actuator)
Maximum pressure:
Normally closed rubber: 8 bar; PTFE: 6 bar (optional)
Normally closed rubber: 6 bar; PTFE: 4.5 bar (standard)
Normally open and double-acting rubber: 8 bar; PTFE: 6 bar
By switching to different actuators, higher pressure ratings can be achieved.
Forged valve body: 1.4404/316L /1.4435 NB2 Fe ≤ 0.5%
Cast valve body: 1.4404/316L
Connection methods: welding, clamp, flange, threaded
Valve body configuration: 2-port, 3-port, etc.
Diaphragm materials: EPDM+PTFE (double-layer)/EPDM/Silicone/FPM (Viton)
Certification: 3A-18-03, PED/97/23 EC, FDA 177.2600

Category:

Diaphragm valve

Technical Specifications
Pneumatic diaphragm valves for tank bottoms are used for venting and draining process media in pharmaceutical tank equipment.
SIZE: 1"-4", DN25-DN100
Maximum temperature: -20 to 150°C (depending on the diaphragm) (stainless steel actuator)
Maximum temperature: -20 to 130°C (depending on the diaphragm) (plastic actuator)
Maximum pressure:
Normally closed rubber: 8 bar; PTFE: 6 bar (optional)
Normally closed rubber: 6 bar; PTFE: 4.5 bar (standard)
Normally open and double-acting rubber: 8 bar; PTFE: 6 bar
By switching to different actuators, higher pressure ratings can be achieved.
Forged valve body: 1.4404/316L /1.4435 NB2 Fe ≤ 0.5%
Cast valve body: 1.4404/316L
Connection methods: welding, clamp, flange, threaded
Valve body configuration: 2-port, 3-port, etc.
Diaphragm materials: EPDM+PTFE (double-layer)/EPDM/Silicone/FPM (Viton)
Certification: 3A-18-03, PED/97/23 EC, FDA 177.2600
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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 of up 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 materials 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.

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Diaphragm valve at the bottom of the tank

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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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