DURING OPERATION TAKE INTO ACCOUNT THE FOLLOWING WARNINGS:
a- Graphite/Graphoil packing and body gaskets are very brittle, any impacting, twisting or bending
should be avoided.
b- The valve’s internal parts such as disc, stem, seats, seals, gaskets shall be handled with care avoiding
scratches or surface damage.
c- All tools and equipment for handling the internal parts shall be soft coated.
d- Valves can be fitted with gaskets or seals in PTFE, Buna, EPDM, NBR, Viton, etc., hence chemicals or high
temperatures will damage sealing components.
e- Never part open valve or part close, gate valves must be full open of full closed to avoid seat damage.
Globe valves can be used to throttle (on clean service only) for short periods but must be at least 25%
open or else venturi action will damage seating area and body.
For all operations make reference to position number on part list of the applicable drawing listed.
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
4
IRON GATE & GLOBE VALVES - SL201, SL600, SL601
Packing leakage could result in personal injury. Valve packing is tightened prior to
shipping but may require readjustments to meet specific service conditions.
Check the packing box for pressurised process fluids even after the valve has been
removed from the pipeline, particularly when removing packing hardware or
packing rings, or removing packing box pipe plug if fitted.
If a gasket seal is disturbed while removing or adjusting gasketed parts, APV
recommends installing a new gasket while reassembling. A proper seal is required
to ensure optimum operation.
Personal injury may result from sudden release of any process pressure. APV
recommends the use of protective clothing, gloves and eye wear when performing
any installation or maintenance.
Isolate the valve from the system and relieve pressure prior to performing
maintenance.
Disconnect any operating line providing air pressure, control signals or electrical
power to actuators.
