API 6A A c tu Ators - Array

mODEL APPm PISTON PNEUmATIC ACTUATOR
FOR API 6A WELLHEAD GATE VALVES
GENERAL DESCRIPTION:
the Model APPM actuator is a piston type, pneumatically-powered
gate valve actuator with an integrated manual override designed to
operate a “fail-closed” or “fail-open” safety valve. It is ideally suited
for wellhead safety valve applications, flow lines, header valves and
gathering lines. It can also be used for casing relief valve and
storage valve applications.
the Model APPM actuator is easy to maintain and engineered to
ensure years of trouble-free service in the harshest of environments
and operating conditions.
the Model APPM actuator is currently only delivered as a complete
actuated valve assembly ready to be placed in service.
FEATURES AND BENEFITS:
Longer Top Shaft Seal Life: Polypak seals are used for
actuator shaft sealing applications. these seals are
protected from accumulation of dirt and debris by a durable
wiper ring. these two features provide long seal life and
minimal maintenance.
Ease of Maintenance: the APPM is easy to maintain.
the Actuator design allows for easy removal of the piston
housing for piston and shaft seal replacement.
Improved Corrosion Control: All non-stainless components
are coated with Xylan and Polyester tGIc providing resistance
against the corrosive effect of harsh environments.
Over-Pressurization Protection: A pressure relief device
located on the Actuator top case protects personnel from
over-pressurization of the actuator assembly. It is located
for easy field inspection and replacement.
Confirmation of Bonnet Stem / Back Seat Seal Integrity:
the bonnet is designed with a test fitting below the
bonnet packing seals. this test fitting provides for
verification of the bonnet stem metal to metal backseat
pressure sealing integrity.
Flexible Adaption: the APPM Actuator can be mounted
on the secondary master or wellhead flow wing. the
actuator can be mounted at any point where safety shut
down or safety valves are required.
Easy Closing: the APPM Actuator can manually open
the gate valve in case of pneumatic control pressure loss
or mechanical failure without assistance of an outside
pressure source.
Visual Confirmation of Bonnet Packing: A tattletale port
located above the bonnet packing seals provides visual
confirmation of the packing integrity.
Multiple Safeguards Against Well Fluids Contamination:
the bonnet incorporates multiple safeguards against
the invasion of well fluids into the actuator housing. these
safeguards are:
• Multiple Polypak bonnet stem seals
• Packing integrity port
• Metal to metal back seat/stem seal
• secondary seals
(shown with typical bonnet assembly)
Pneumatic Control Supply: the APPM Actuator operates
at a maximum of 250 psi.
Fail Safe Operation: the APPM Actuators will close a gate
valve to the “fail safe” or “fail close” position automatically.
mODEL SIZE STROKES AVAILABLE
APPM 1300 13" up to 2 1 ⁄16" bore
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