Groth 1660A - Manual (Page 5)

Page 5 of 16
Lifting eyes are provided on the upper
actuator for handling the valve. To avoid
damage to the lower flange surface, set the
valve on a soft clean gasket material until it is
ready to be installed. It should be stored in a
clean environment until it is mounted on the
tank. The pilot pickup fitting is in the body and
must be kept completely free of all foreign
materials.
INSTALLATION
Handle the 1660A POV carefully to ensure
seat tightness & proper operation.
WARNING: The valve must be installed in
a vertical position as shown in Fig 1. Any
nozzle, piping, or fittings between the relief
valve and the protected equipment must
be such that the pressure drop will not
reduce the relieving capacity below that
required or adversely affect the proper
operation of the relief valve. A nozzle as
shown in Fig 3 will not significantly impact
the flow capacity or operation of the relief
valve.
Figure 3: Suggested Tank Nozzle Design
1. At installation, the valve should be
smoothly lifted into position using the
lifting eyes on the actuator. Use the
actuator housing or outlet flange to align
the valve directly over the flange. Do
NOT use the pilot valve or sense line to
pull the valve into position.
2. Aluminum valve bodies should be
connected with flat-faced 150# ANSI
flanges with a full-faced gasket. Mating
flanges should be flat within .020" and
clean, free of scratches, corrosion and
tool marks.
3. Each valve is leak tested at the factory as
part of our standard inspection
procedures.
4. Inspect the gasket; make sure that the
material is suitable for the service.
Gasket dimensions are listed in Table 2.
Full gaskets must be used with flat face
flanges. Either full or ring gaskets may be
used with raised face flanges.
Table 2
Inlet/Outlet Flange Gasket Dimensions
ANSI
150# I.D.
Ring
O.D.
Full Face Gasket
O.D. B.C. Holes Qty
2” 2.38” 4.12” 6.00” 4.75” 0.75” 4
3” 3.50” 5.38” 7.50” 6.00” 0.75” 4
4” 4.50” 6.88” 9.00” 7.50” 0.75” 8
6” 6.62” 8.75” 11.00” 9.50” 0.88” 8
8” 8.62” 11.00” 13.50” 11.75” 0.88” 8
10” 10.80” 13.38” 16.00” 14.25” 1.00” 12
12” 12.80” 16.12” 19.00” 17.00” 1.00” 12
16” 16.00” 20.25” 23.50” 21.25” 1.12” 16
5. Lubricate all studs and nuts with an
appropriate thread lubricant. If stainless
steel fasteners are used, use an anti-
seize lubricant such as moly-disulfide.
6. Studs are installed in the valve body at
the factory. Center the gasket within the
bolt circle of the tank nozzle flange.
7. Set the valve carefully on the nozzle.
Make sure the flow path is not restricted
by valve or gasket mis-alignment.
8. Install nuts and lock washers and torque
all fasteners to half the value listed in
Table 3 or 4 in a staggered, alternating
pattern.
9. Make sure that the flanges are not
distorted and that the gasket is evenly
compressed.
10. Make up the final torque and check that
no further nut rotation occurs at the
specified torque value.
11. Normally, the pilot sense line is integral to
the valve assembly. However, if the
optional remote sense connection is
specified, an external sense line must be
installed. See the appropriate options
manual or attached tag for
recommendations.