What is Saunders diaphragm valve?
Saunders® aseptic diaphragm valves are supplied into critical process applications in the world’s most closely regulated industries such as pharmaceutical, beverage, and personal care. Saunders diaphragm valves are engineered to the highest level of design security, integrity, and cleanliness for aseptic applications.
What are the types of diaphragm valve?
There are two main categories of diaphragm valves: one type seals over a “weir” (saddle) and the other (sometimes called a “full bore or straight-through” valve) seals over a seat.
What is Weir type diaphragm valve?
Weir type diaphragm valves, bidirectional, for stopping or regulating the flow of the service fluid in HVAC, water treatment plants or process industry. Valves are bolted bonnet, seatless design, with a diaphragm as closure element, with rising handwheel.
What is the advantage of straight through type diaphragm valve?
Specifically suited to handle erosive and abrasive applications, its unobstructed full bore provides excellent performance with low pressure drop. At valve fully open offers self cleaning design. It is the best choice for dirty, contaminated and powder media.
Which is handled by diaphragm valve?
Diaphragm valves are bi-directional, on-off throttle valves. They are used to control fluid flow by regulating the area with which media can enter and exit the valve, effectively changing its speed and velocity.
How does a diaphragm valve work?
Diaphragm valves use a flexible diaphragm connected to a compressor by a stud which is molded into the diaphragm. Instead of pinching the liner closed to provide shut-off, the diaphragm is pushed into contact with the bottom of the valve body to provide shut-off.
What are the 2 types of diaphragm valves?
There are two main designs of diaphragm valves in industry: the weir/saddle type diaphragm valve and the straight-through/full bore diaphragm valve. These valves function similarly but only differ in their body shape, diaphragm, and application.
Are diaphragm valves good for throttling?
Weir-type diaphragm valves are better at throttling than straight though diaphragm valves because the design’s large shutoff area along the seat gives it the characteristics of a quick-opening valve. The diaphragm acts as the gasket of the valve to seal against leaks between the body and bonnet cap.
Which material is used for diaphragm?
Typical diaphragm materials and their main properties when used in diaphragm valves
| Material | Size | |
|---|---|---|
| inches | mm | |
| White natural rubber | 0.6 – 5 | 15 – 125 |
| White butyl | 0.6 – 6 | 15 – 150 |
| Viton | 0.6 – 14 | 15 – 350 |
What are the advantages of diaphragm valves?
Advantages of Diaphragm Valve
- Can be used as on-off and throttling service valves.
- Offer good chemical resistance due to a variety of linings available.
- Stem leakage is eliminated.
- Provides bubble-tight service.
- Does not have pockets to trap solids, slurries, and other impurities.
What is a weir valve?
Weir Valves A weir valve is a type of diaphragm valve in which the flow passage includes a weir, or a notch with a horizontal edge through which a substance flows. In the open position, the diaphragm lifts up and allows a substance to flow freely through the valve.
Why are Saunders diaphragm valves used in industrial applications?
Our Saunders A Type diaphragm valves have been developed to handle a wider range of fluids and gases than any other valve type. A wide choice is available for materials, methods of operation and body end connections 窶・to satisfy the needs of most corrosive and abrasive applications.
When did PK Saunders invent the diaphragm valve?
PK Saunders invented the diaphragm valve in 1928. In succeeding years have developed a range through innovation in both design and new materials technology. As a result, Saunders diaphragm valves have gained an excellent reputation worldwide for versatility and reliability in Aseptic and in Industrial applications with corrosive and abrasive media.
What are the different types of diaphragm valves?
We offer four main types of diaphragm valve, each type specifically suited to these applications. Saunders Weir Type A Diaphragm Valve (for Industrial and Corrosive duties) Saunders Straight Through Type KB Diaphragm Valve (Abrasive Duties) ‘A’FP Type for high purity applications.
Who is the world leader in diaphragm valves?
As a result, Saunders® diaphragm valves have gained an excellent reputation for versatility and reliability, establishing a presence in every process industry sector. Today, Saunders® is an international leader in the design, development and manufacture of diaphragm valves.