Diaphragm Valves/

Sanitary Diaphragm Valves

Sanitary diaphragm valves are process flow regulation devices constructed of sterile materials and designed to create an aseptic environment for liquid, gaseous and semi-solid material flows. Like all diaphragm valves, these mechanisms use a membrane made of elastomeric polymers to stop, start and modify the flow and pressure of process streams for a number industrial and commercial manufacturing applications.

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Burkert Fluid Control Systems
Irvine, CA
800-325-1405
At Bürkert Fluid Control Systems, we are never satisfied with the status quo and are continually seeking new technologies and solutions for our customers. Consistent and continuous investment in research and development and in staff training enables us to offer our customers the very best in technology and services. For your upcoming sanitary diaphragm valves and other orders, call Bürkert.
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Dwyer Instruments, Inc.
Michigan City, IN
800-872-9141
Since 1931 Dwyer Instruments has been committed to providing every customer with high quality products at cost-effective prices. Through their ability to diversify, they are able to maintain stability and provide a basis for positioning themselves as a leader in providing knowledgeable, prompt, and courteous customer service. Turn to Dwyer for all of your sanitary diaphragm valves.
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Century Instrument Company
Livonia, MI
734-427-0340
At Century Instrument Company we promise to use only those materials or suppliers that meet ASTM standards or other accepted industry standards and maintain incoming quality control of all new material or assembled sub assemblies. When it comes to the sanitary diaphragm valves you require, you deserve only the best. Turn to a company that always provides the best service you can buy.
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Simtech USA
Levittown, PA
877-777-2467
Simtech serves a large and diverse customer base in the pharmaceutical, biotechnology, semi-conductor, chemical processing, pulp and paper, water/wastewater, medical research/ life sciences and OEM marketplaces. They understand what it takes to deliver on demanding customer requirements across a wide range of application areas. For sanitary diaphragm valves, call today!
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Flow Valves International
Cortland, IL
866-919-0833
For more than 75 years, Flow Valves International has partnered with our customers to solve material handling requirements in the most demanding and diverse industries and applications. We understand that good, reliable equipment, which operates at peak performance, is crucial to your bottom line. For quality and service you can depend on, contact us for sanitary diaphragm valves.
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Industry Information

Sanitary Diaphragm Valves

Sanitary diaphragm valves are carefully regulated to ensure clean processing of materials in industries such as dairy, food and chemical processing, medical, pharmaceutical, agricultural, brewing, beverage production, cosmetics, semiconductor and bio-processing. The Food and Drug Administration (FDA) is one of several regulatory bodies that require many of these applications to employ valves which are drainable, cleanable and able to be sterilized. Diaphragm valves offer each of these features in addition to being one of the most leak resistant valve models available. Zero static valves are often employed with sanitary applications as well to eliminate dead space, or valve recesses in which materials may accumulate and stagnate leading to potentially damaging and dangerous bacterial growth and contamination. Although seat valves can be sanitized, weir valves are more often used in hygienic valve applications as they ensure minimal product contact of surfaces, reduced hold-up volume and minimal entrapment areas.

The basic operating process of a diaphragm valve is fairly simple. The body of the valve, a cylindrical or spherical device is attached to the necessary pipeline or cistern. This component houses the actuating device and any connected hardware. Pneumatic, hydraulic, electrical and manual actuation may be used and so specific designs may vary significantly. The diaphragm is located in the center of the body, but in normal position is flush against the wall so as not to impede flow. When the membrane is engaged, however, the diaphragm is stretched toward the opposite surface of the body to a specific depth. To completely halt the process stream, the membrane must cover the entire diameter, while slowing the flow means only extending the diaphragm partially. When the actuator relieves the pressure the diaphragm returns to its relaxed position and maximum flow resumes. As the diaphragm and the body of the valve come into contact with the process flow, they must be made of sterile materials in order for the valve to qualify as a sanitary diaphragm valve. Common materials for each include stainless steel, copper, bronze, cast iron, PVC and CPVC among others. Forged, molded or die cast, each component is designed to prevent any foreign matter from collecting in the interior recesses of the valve. While the valve exterior is not strictly regulated, the internal surface which encounters the sterile materials should be smooth with no burrs that might dislodge in the process stream. Additional considerations for sanitary diaphragm valves include chemical resistance, clean room assembly, operational temperatures and pressures, diameter and overall dimensions.