Inverted lubricated plug valve

The valve is a «pressure balanced», inverted type, lubricated taper plug valve. The plug has 2 balancing holes connecting the chambers at each end of the plug with the port. This maintains balance and prevents taper locking. Tight shut-off is ensured by lapping the plug to fit precisely inside the body and by injection of a film of lubricant, which stops leakage and prevents penetration of dirt into the seating area. It is used with a lubricant generally based composite with improved viscosity oil which is injected under pressure between the plug and the body seat to reduce friction in seals.


1. Logical structure, reliable sealing and excellent action.
2. Pressure balance structure with encapsulated plug and position indicator.
3. There is an oil lubricator between the valve body and the seal surface which allows the gasket to be lubricated and the sealing capacity to be increased.
4. Flange materials and dimensions will be selected depending on users’ requirements.


Size: 1/2″-14″
Pressure: 150 – 900LB
Material: A216 WCB, A217 WC1, A351 CF8M, WC6, WC9, CF8M, CF3M, CF5M or other alloys
Design and production standard: API599, API 6D
Distance between flanges: ANSI B16.10
Flange connection: ANSIB16.5
Test standard: API598, API6D
Structure: Bolted bonnet
Actuation: may be activated manually or electrically
Medium: The valve is suitable for several media including water, steam, oil, gas, petrol products, nitric acid, acetic acid, etc.
Working temperature: from -196ºC (cryogenics service), -46ºC or -50ºC (stainless steel constructions) and -29ºC (carbon steel constructions) up to 180℃

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