Flowserve Serck Audco Twin Isolation Plug Valve - Manual (Page 11)

7 MAINTENANCE (cont.)
7.1.3 VALVE SEALANTS AND LUBRICANTS
Only sealants recommended for TAPER plug valves should be used. Serck Audco supplies sealants for
most services. If you already have a particular valve sealant in use at a facility, we will advise on the
suitability for use in TIPV valves.
We strongly recommend against the following types of sealant:
• Sealant supplied by cylindrical/parallel plug valve manufacturers. These are of much higher viscosity
than taper plug valves require and will substantially increase the valve torque.
• Commercially available lubricating grease such as bearing grease. Theses greases do not have the
chemical resistance, lubricating and sealing properties required by taper plug valves.
7.1.4 INJECTING SEALANT
The sealant should be inserted using equipment suitable for plug valve seat sealant injection such as
the 400-D sealant Gun or the 10-90 Trolley Gun or Hypregun or similar and is done by connecting the
sealant injection equipment to the giant buttonhead fitting on the valve. Please refer to the manufacturers
operating instructions for the operating and maintenance procedures of the sealant injection equipment.
Sealant can be injected with the valve in-line and on pressure.
7.1.4.1 POSITION
If possible the valve should be fully opened or fully closed, to ensure that all four plug sealant grooves
are connected to the sealant supply. If the valve is partially open, injection is less effective as only two
of the grooves are connected to the supply.
7.1.4.2 SEALANT FITTING
Clean the ‘Giant Buttonhead’ fitting on the valve. In particular scrape off any paint build-up away from
the small hole in the end of the fitting.
7.1.4.3 FILL THE GUN
Ensure the gun is filled and primed with the taper plug valve sealant. Follow the gun manufacturers
instructions to fill the gun.
7.1.4.4 ATTACH THE GUN
Slide the ‘Giant Buttonhead’ coupler on the end of the gun hose, over the valve’s ‘Giant Buttonhead’
fitting, ensuring that the lip of the coupler fits into the groove in the fitting. If the gun has an isolating
valve on the coupler or elsewhere, open this valve.
11 flowserve.com
Serck Audco TIPV Twin Isolation Plug Valve FCD - SRENIM0005-04 (A4) – 02/14