Extended life, reliability, safety and ease of use, combined with an essentially simple design, facilitate low maintenance and minimal running costs. When subjected to both pressure and vacuum, Saunders® diaphragm valves operate and close 100% leaktight. This feature reduces processing and handling costs by cutting out the waste normally associated with conventional valve designs.
Operating mechanism not in contact with line media
No contamination of the line media. If valve is being used on slurry duty, the operating mechanism cannot seize
Valve operates first time even after long idle periods
Because of the relatively low torque of a diaphragm valve and the grease reservoir in the bonnet, the valve will open or close after long idle periods
100% leak tight
The diaphragm valve is 100% Leaktight as standard, there is no need to fit special glands
Lined for excellent corrosion resistance
Because of the vast range of linings available Saunders can offer a diaphragm valve to suit most applications.
Also, having a wide choice of body lining materials available allows us to be more economical by not having to use exotic alloys
Suitable for control
Because of the diaphragm valves linear flow characteristics the ‘A’ Type valve gives a good flow control range between 30% and 70% travel
No seat wear
No matter how many times the valve is opened and closed there will be no seat wear due to contact rotation as seen with ¼ turn valves
Ease of service
The valve body can remain bolted in the pipeline and just the bonnet removed and the diaphragm replaced
Cost effective
Because the body remains in the pipeline during service and it takes only minutes to change a diaphragm, there can be significant down time savings at site
Abrasion & solids resistance
The KB straight through valve will handle up to 100% solids and with the use of a soft rubber diaphragm, will still give 100% tight shutoff
Weir & straight through types
Two valve designs to allow maximum process efficiency
Vavle Type |
A Type, KB type |
Valve Size |
DN20-DN250 |
Valve Rating |
Ansi 125/150, PN10/16, JIS 10K |
Valve Temperature |
-20oC- 175oC |
Body Material |
SG Iron, Cast Iron, Stainless Steel |
Lined Material |
Plastic, Rubber,PFA,PTFE, Glass |
Diaphragm Material |
Rubber, EPM, PFA, PTFE |
Flow Characteristic |
On-Off |
Operation |
Hand wheel, Pneumatic Actuator. |