GLOBE VALVES OS & Y - FORGED - ISO 15761/API 602/B16.34
Australian Pipeline Valve - Installation, Operation and Maintenance Manual
5
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 or else take extreme care,
especially on machined mating surfaces and with soft parts.
d- Valves can be fitted with gaskets or seals in PTFE, Buna, Viton, etc., hence high temperatures will
damage sealing components.
e- Globe valves can be used to throttle for short periods (on clean service only) but only if at least 25%
open or else venturi action will damage seating area, body.
For all operations make reference to position number on part list of the applicable drawing listed.
Packing leakage could result in personal injury. Valve packing is tightened prior to
shipping but may require readjustments to meet specific service conditions.
Personal injury may result from sudden release of any process pressure. APV
recommends the use of protective clothing, gloves and eyewear 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.
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 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.
