2 Diaphragm valves always one step ahead

The main feature of our valves is the manufacturing process. All valve bodies are manufactured from solid bar stock or block material, including all connecting ends (DIN, ISO, Tri-Clamp etc). This method excludes welded seams, porosity, varying density, internal material movement and miniature cracks common with forgings/castings. By this extraordinary feature our products differ in a decisive way from comparable products on the market. Our success is based on our customer-oriented design with high standards of quality combined with maximum flexibility. Through the availability of modern CNC-machines combined with highly-qualified staff we are able to offer fast and efficient delivery to our customers.
 

Valve bodies

Valve bodies with buttweld connections Integral valve body and buttweld ends are manufactured from one solid block, no welding. Tube lengths are available to accommodate automatic (orbital) welding.

Valve bodies with Tri-Clamp end connections Tri-Clamp connections according to DIN 11850 and SMS 3008. Clamps for valve sizes are made from one solid block, no welding. This prevents porosity, varying density and eliminates miniature cracks often common in cast or forged materials.

Valve bodies with screwed ends Integral valve bodies made from one solid block with threaded ends to DIN 11851 SMS and BS 186, internal or external threadings.

T pattern valve bodies

T pattern valve bodies Integral body with ends machined from a solid block. There are a wide variety of port sizes and configurations available. Ideal for sampling valves. Delivered with buttweld ends, Tri-Clamp and threaded ends, standard manual or pneumatic actuators.

Tank bottom valve bodies

Tank bottom valve bodies Integral valve body, manufactured from a solid block, no weldings. Entrapment free. The conical flange assures drainability. Delivered with buttweld ends, Tri-Clamp, threaded ends, standard manual or pneumatic actuators.

Custom made valve bodies

S-type valve body with internal threads both sides.
 

Special V-type valve body with 3 actuators and butt weld ends, for controlling small flows of liquid.
 

V-type valve body: special thread on one side and butt weld end on the other. V-type to be used for small liquid flow.
 

T pattern S-type valve body for sampling. Through hole design with Tri-Clamp ends and hose connector exit.
 

Flexible solutions for customers Due to their simple design and the wide range of applications, diaphragm valves are widely used when ease of thorough cleaning is required. In many applications, the use of standard valve bodies is limited. Our special application valves, designed by 3D-CAD systems, very often replace complicated multi-valve designs.

Customer benefits of multi-way valves:

Diaphragms

Elastomer diaphragms Soft elastomer diaphragms consist of a mixture of vulcanised rubber, reinforced with a net of a special material. This process offers higher wear resistance, increased dimensional stability and increased temperature range. As a result more flexibility and a longer service life. Standard materials of rubber diaphragms are as follows:

TFM/PTFE diaphragms PTFE diaphragms offer the highest possible degree of chemical resistance and last considerably longer than soft elastomer diaphragms. Sizes NW 08/10 have a sandwich construction (TFM and EDPM combined). All other sizes offer a 2 piece construction with higher flexibility. This permits the closing force to be minimal, enhances reliability and increases service life of the diaphragms, in particular if exposed to steam

FDA acceptance All diaphragms meet FDA standards, with the exception of standard FPM (Viton). A certificate of conformity is available upon request.

Marking All diaphragms are marked on the reverse side for identification of material and production date. Apart from the standard diaphragm program, other materials are available on request

Actuators

Manual handwheels Corrosion and wear resistant bonnets with 4 screws for easy assembly. Additional O-ring for perfect sealing. Bonnet material is hard anodised or PFA coated aluminum, or a lower cost unit with PA66-GF. Autoclave temperature is 130° C.

Advantages:

Stainless steel bonnets For optimum performance and wear resistance. Autoclave temperature is 130° C. Handwheel made of stainless steel or POM. Polished stainless steel bonnets are available for DN 08–DN 25. Sizes above DN 40 have handwheels with stainless steel spindles.

Bonnets DN 25 and up PFA coated or hard anodised aluminum bonnets. Large size handwheels for easy operation. Handwheels are made of an epoxy coated light weight material with stainless steel spindle. Autoclave temperature is 130° C.

Pneumatic actuators For automatic operation, double acting spring to close and to open, with different springs for different diaphragm material. Available with housing made of hard anodised aluminium or with PFA coated aluminum. Visual indication of valve position. Autoclave temperature is 130° C.

Pneumatic stainless steel actuators Housing and components made of stainless steel. Spring to close and to open or double acting in one construction. Visual indication of valve position. Autoclave temperature is 130° C.

Custom made actuators

Lever activated diaphragm valve for quick control of fluids.

Diaphragm valve with stroke limitor for restricted stroke and for applications where uncontrolled opening of the valve should be prohibited.

Pneumatic actuator with solenoid valve for remote control.

Manually operated diaphragm valve with spindle extension for areas with limited access.

Accessories

Digital position indicator Inductive positioning indicator for open or closed position. With digital position indicators, diaphragm valves from VALV AG can be considered as automatic control valves.

Endschalter Proximity switches

Solenoid valves
2 types: