Cla-Val 353GF - Manual

The Model 353GF Pressure Control
Coupler has been designed and tested to
conform to all requirements of API 1584
“Four Inch Hydrant System Components
and Arrangements”, Second Edition. The
Coupler makes a very robust connection to
any 4 inch API style hydrant pit valve or
hydrant adapter. This connection greatly
exceeds the side-pull requirements of the
API Bulletin 1584. Yet, because of the use
of hardened Stainless Steel balls to make
this connection, the Coupler can easily turn
when connected to remove stress on the
intake hose connected to the outlet of the
Coupler.
The Model 353GF Pressure Control
Coupler incorporates a pressure regulating
valve that is deadman operated. The
Coupler can be configured to accept either
compressed air (Option A) or pressurized
fuel (Option H) as the motive deadman
fluid. Connection points for both the dead-
man signal and the feed-back fuel sense
signal are conveniently located on the Pilot
Block on the top of the Coupler. These
connections are also positioned to reduce
the stress on deadman and fuel sense
hoses.
Additionally, Bleed Valves are provided on
the side of the Pilot Block so that entrapped
air in the Fuel Sense hose and Hydraulic
Deadman hose (if Option H is selected)
can easily be purged. These Bleed Valves
feature an outlet sized for a 1/8 inch diam- eter hose that can be slid onto the outlet of
the Bleed Valve to direct the bled fuel into
a catch container, thereby eliminating fuel
spillage during the purging.
When pressure is applied to the deadman
port on the top of the Coupler, the pressure
regulating valve opens to allow flow into
the receiving aircraft. The opening time is
controlled by a fixed, non-adjustable ori-
fice, conforming to the requirements of API
1584. Failing (relieving) the Deadman
pressure causes the Model 353GF
Pressure Control Coupler to close. For
Couplers with Option A (Air Deadman), the
closing time is adjustable beyond a range
of 0.5 second to 2.0 seconds. This adjust-
ment is located on the side of the Pilot
Block on the top of the Coupler. For
Couplers with Option H (Hydraulic
Deadman), closing time is a function of the
Deadman plumbing system on the refuel-
ing vehicle.
The Model 353GF Pressure Control
Coupler is a remote sense regulator. It
controls the pressure connected to the
Fuel Sense port on the top of the Coupler.
Ideally, the Fuel Sense source will be a
Venturi that is adjusted to simulate the
pressure in the refueling Nozzle connected
to the receiving aircraft. (Otherwise, the
Fuel Sense source should be as close to
the Nozzle on the refueling vehicle as is
practicable.) This “Nozzle pressure” is
then adjustable by regulating the Deadman pressure. Raising the Deadman pressure
increases the Nozzle pressure. The differ-
ence between the Deadman pressure and
the resultant Nozzle pressure is about 20
psig.
The Model 353GF Pressure Control
Coupler is supplied with a Folding
Operating Lever. The Lever is spring
loaded so that it folds against the body of
the Coupler when not in use to prevent
damage during handling and transporta-
tion.
The Cla-Val Model 353GF Pressure
Control Coupler is designed and construct-
ed of high strength aluminum and stainless
steel. Both the large and small pistons
within the Coupler are made of stainless
steel, a Cla-Val exclusive, providing for
superior, long lasting sealing and a high
level of durability. It also utilizes the latest
in low friction seal technology to ensure
accurate operation. The overall pressure
drop through the fully open Model 353GF
Pressure Control Coupler is the lowest
available.
This allows for the fastest possible refuel-
ing cycles.
Specific additional equipment is required
for Couplers with Option H, Hydraulic
Deadman. See Cla-Val document number
206396 “Installation Instructions and
Required Equipment” for more information.
Pressure Control Coupler
353GF
• Conforms to API Bulletin 1584 Second Edition
• Pneumatic or Hydraulic Deadman Options
• Accurate Nozzle Pressure Regulation
• Excellent Surge Pressure Control
• Deadman and Fuel Sense Connections Conveniently
Located
• Bleed Valve(s) supplied, on the Pilot Block
• Standard Folding Operating Lever
The Model 353GF Pressure Control Coupler is a hydrant coupler used in
jet aircraft refueling operations. It connects to a hydrant pit valve or hydrant
pit adapter to allow pressurized fuel to flow from an underground pipeline
and into the receiving aircraft. It incorporates a Deadman operated, direct
acting pressure regulator that protects the receiving aircraft from excess
pressure and from damage due to pressure surges.
MODEL