AKO air operated Pinch Valves with Internal Thread Connection - VMF Series
The air operated pinch valves of the VMF series are available in the nominal diameters of DN032 to DN50.
They are designed with an internal thread connection conforming with DIN ISO 228 and alternatively NPT as standard. On request, the VMF series air operated pinch valves can also be offered with alternative individually customised connections.
Structure of VMF series:
The structure of the VMF series air operated pinch valves encompasses the sleeve - the essential part of every pinch valve - a body, two sockets and two retaining rings. The pinch valve sleeve is positioned in the centre of the VMF series air operated pinch valve's body; both of its ends are pressed in by the sockets, which are screwed to the body over the two retaining rings, thus forming a compact unit.
Function of AKO Pinch Valve VMF series:
The VMF series air operated pinch valve is closed by differential pressure of 2-3 bar being fed via the medium/operating pressure (depending on the elastomer grade) into the pinch valve body. As soon as the pressure supply is interrupted and the pinch valve body bled, the pinch valve sleeve opens again completely because of its enormous rebound resilience.
Only the sleeve and the two socktes are in the product flow (contact with the operating medium) of the VMF series air operated pinch valve.
Materials of AKO air operated Pinch Valves VMF series:
A selection of 12 different elastomer grades for the sleeve (natural rubber, food quality rubber, high temperature rubber, neoprene, EPDM, EPDM food quality, viton, silicone, nitrile, nitrile food quality, butyl and Hypalon) ensures that the VMF series air operated pinch valves have a very wide and practically unrestricted field of application.
Furthermore, a selection of two different socket materials supports the diverse application of the VMF series AKO air operated pinch valves.
On the one hand, POM natural (white) is available for foodstuffs and applications in the internal range, and on the other hand there is a stainless steel model AISI 1.4404, which is suitable for using the VMF series air operated pinch valve in the foodstuffs sector, outside and a special model for use in areas at risk of explosions (EX).
The bodies are made of aluminium as standard.
Maximal operating pressures Pinch Valves VMF series:
DN032-DN050: 6 bar
Adam-Opel-Str. 5
65468 Trebur-Astheim, Germany
Phone: +49 (0) 6147-9159-0
Fax: +49 (0) 6147-9159-59
13 Alvis Way
Royal Oak Trading Estate
Daventry, Northants NN11 8PG
Great Britain
Phone: +44 (0) 13 27 31 27 47
Fax: +44 (0) 13 27 31 25 65
sales@ako-valves.com 
www.pinch-valve.com
Contact for sales in Great Britain and Ireland.
Alb. Klein Ohio LLC
8275 Estates Parkway
43064 Plain City OH, USA
Phone: +1-614-873 89 95
Fax: +1-614-873 89 96
Data sheets:
Product Overview Air operated Pinch Valves.pdf (1.1 MB)
Controls.pdf (377 kB)
Operating Instructions:
Operating Instructions V+VA+VF+VT+VM+VMF+VMP.pdf (247 kB)
Operating Instructions for EX-areas.pdf (393 kB)