Groth 3011L - Manual (Page 14)

13
TABLE 7 – RECOMMENDED BOLT
TORQUE
TABLE 7
RECOMMENDED BOLT TORQUE [FT. - LB.]
Bolt Size 10-32 1/4" 5/16" 3/8" 7/16" 1/2"
Torque 3-5 6 11 20 32 44
All screw threads and static O-Rings should be lightly
greased with grease. Lubricate the piston OD at both ends
and the spring adjusting screw with Dry Moly spray. If the
greases listed above are not compatible with the tank
vapors, use equivalent lubricants for that media. All pipe
threads are to be wrapped with Fluoropolymer tape or
suitable pipe thread sealant applied sparingly.
Before installing the orifice selector sleeve, read the section
entitled "FLOW CAPACITY SETTING" and related warnings
on page 7. Install the orifice selector sleeve [12] into the
regulator body. Observe the sleeve position locking hole by
looking in the locking screw hole in the body. The hole in the
sleeve should be exactly centered in the screw hole. If the
holes do not line up exactly, invert the sleeve and reinstall.
The position indicating numbers will also be seen through
the screw hole.
These numbers indicate % open and flow capacity according
to Tables 4 and 5. Make sure that the sleeve position is on
the same number as when disassembled, or on the number
that provides the specified flow requirements.
FIGURE 8: ORIFICE SLEEVE ORIENTATION
Grease the locking screw O-Ring [41] and slip it over the
screw threads. Thread the orifice lock screw [13] into the
body, finger tight, until the point enters the sleeve and the
head seats onto the O-Ring. Then wrench tighten the head
firmly against the body, compressing the O-Ring.
Note: Damage to the sleeve will occur if force is
applied with the point of the locking screw.
FIGURE 9: EXPLODED PISTON ASSEMBLY
Assemble the piston sub-assembly according to Figure 9.
Install the piston O-Ring [37] from the top end of the piston.
Do not roll the piston O-Ring, but stretch it just enough to
clear the piston diameter. When installing the O-Ring retainer
[7], retaining ring [38] and lift stop ring [47] (1" models only)
expand the rings just enough to clear the piston without
scratching the piston or permanently deforming the rings.
FIGURE 10: PISTON/BODY ASSEMBLY
Slide the piston guide ring [14] over the lower end of the
piston and let it rest on the lift stop. Attach the lower piston
diaphragm [36] to the piston [6] with the diaphragm retainer
[8] and hex bolt [31] for 1" or button head cap screws [30] for
1/2".
Note: Make sure that the diaphragm reinforcing fabric is
facing away from the piston. This is essential to
develop the pressure rating of the diaphragm.
Secure the body in a vise with the bottom surface facing
upward and the inlet port accessible (See Figure 10). Spray
the piston sub-assembly with Dry Moly spray and insert it
into the body. Install the guide ring O-Ring [40].