Flowserve Serck Audco Twin Isolation Plug Valve - Manual (Page 10)

6 OPERATION (cont.)
6.4 REMOTE OPERATION
Where automation of valves is required, Serck Audco can supply pneumatic, electric, hydraulic, or
gas/hydraulic actuators to cover a wide range of operating torques.
Operation will be in accordance with installation, operation and maintenance instructions for the
relevant actuator.
Before pressurising the valve, ensure that all power sources are connected to the actuator, and that all
of the actuator functions and accessories are working correctly.
7 MAINTENANCE
There are four maintenance operations that can be carried out on TIPV valves while in-line and on
service. With these operations, except in cases where the plug becomes heavily eroded, corroded
or damaged, TIPV valves can be fully maintained in-line for many years of trouble free service.
The four operations are:
• injection of valve sealant (required occasionally).
• injection of stem packing compound (emergency feature).
• adjustment of the plug loading screw (unlikely to ever be required).
• rotating the plug through 180 degrees (unlikely to ever be required).
7.1 INJECTION OF VALVE SEALANT
To maintain the bubble tight shut-off capabilities and to ensure smooth operation of the valve.
7.1.1 F REQUENCY OF SEALANT INJECTION
7.1.2 SEALANT INJECTION EQUIPMENT
TIPV valves have ‘Giant Buttonhead’ sealant fittings, unless the customer specifies special fittings
such as sub-sea. To inject sealant , a high pressure sealant gun with a ‘Giant Buttonhead’ coupler is
required. The gun should also have a pressure gauge reading to at least 10,000 psi. The three basic
types that Serck Audco can supply are:
a) Manual primed with screw feed - inexpensive guns for occasional use;
b) Manual with hydraulic feed - recommended for servicing small groups of valves;
c) Pneumatic, using bulk lubricant in 5 quart or larger cans - recommended for large valve installations,
such as manifolds, gas processing plants, compressor stations, and refineries.
NOTE: Do not attempt to use low pressure lubricant guns (e.g. those used to grease wheel bearings).
Service Conditions Frequency of Sealant Injections
A. Infrequent operation, valve either fully
opened or fully closed. Non abrasive
gases or liquids.
Every 50 operations, minimum once per year.
B. Infrequent operation, valve either fully
opened or fully closed. Abrasive gases
or liquids.
Every 25 operations, minimum of 2 times a year.
C. Throttling services and abrasive slurries Every 10 operations, minimum 4 times a year
Serck Audco TIPV Twin Isolation Plug Valve FCD - SRENIM0005-04 (A4) – 02/14
10