Australian Pipeline Valve - Installation, Operation and Maintenance Manual
7
EXPANDING SEAL PLUG VALVE DOUBLE BLOCK & BLEED API6D - TWIN SERIES
APV and it’s resellers refuse any liability for damage to people, property or plant as well as loss of
production and loss of income under any circumstances but especially if caused by: Incorrect installation
or utilisation of the valve or if the valve installed is not fit for the intended purpose. It is the sole
responsibility of the client to ensure the valve type and materials are correctly specified.DURING
OPERATION BEAR IN MIND THE FOLLOWING WARNINGS:
a- The graphoil packing and body gasket is very brittle: any twisting or bending shall be avoided.
b- The internal parts of valves (ball, stem, seats) shall be handled with care avoiding scratches or surface
damage.
c- All tools and equipment for handling and supporting internal critical sealing parts shall be coated with
soft materials.
d- Seats & seals usually include Viton, Devlon, Nylon & Teflon, hence high temperatures and some
chemicals will damage sealing components.
e- Never part open valve, valve must be fully open of fully closed or else the seats will be damaged.
For all operations make reference to position number on part list of the applicable drawing. The drawing
in the Appendix is a general drawing only, for more accuracy refer to the as-built drawings supplied with
the order.
SCOPE OF INSTALLATION ACCORDING TO THE TYPE OF FLUID
(DANGEROUS FOR THE ENVIRONMENT OR HUMAN HEALTH)
Group 1 Classification
- The incorporation of additional safety elements “Double packing” is recommended for the range of
products included in Group 1.
- The use of valves without additional safety devices in Group 1 will be the responsibility of the user or
the purchaser, as well as the advisability of installing leakage detection systems.
Group 2 Classification
- Carbon steel valves will not be used in corrosive fluid lines.
Do not use the ball valve in process conditions where the pressure, temperature,
media and other technical conditions exceed the limitations set by the valve’s
specifications. When handling fluids that could cause damage to human health, the
environment or property, the necessary safety precautions to prevent risk must be
taken.
