Becker VRP-SB-PID Series Natural Gas Controllers Instruction Manual | 42
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NNN
JJJ
OOO
Figure 40
Figure 39
(SIDEVIEW)
THESE TWO NUTS(LLL,MMM)
SHOULD BE TIGHTENED
AGAINST EACH OTHER
THE BOTTOM FACE OF THIS NUT(MMM)
MUST BE FLUSH WITH THE BOTTOM OF
THE ADJUSTING SCREW(JJJ).
MMM
LLL
(SIDEV
KKK
LLL
MMM
JJJ
W
III
Figure 38
III
W
Figure 37
Adjusting Screw Assembly
(Figures 37-40)
Step 52: Press fit the Thrust Bearing (W) into the Bearing
Case (III).
Step 53: Slide a –108 O-Ring (KKK) onto the Adjusting Screw (JJJ)
as shown in Figure 38. Slide the assembly from Step 52 onto the
Adjusting Screw (JJJ).
Step 54: Thread the Aluminum Bearing Nut (LLL) onto the
Screw (JJJ) from the bottom. Leave some room below the
Bearing Nut (LLL), and thread a 1/2-20 SS Left-Hand Jam Nut
(MMM) onto the Screw (JJJ). The Jam Nut (MMM) and Bearing
Nut (LLL) should be tightened against each other as shown in
Figure 39.
Step 55: Place the Tube Cap for VRP-600/1000_SB-PID or
Tube Cap SS for VRP-1500-SB-PID (OOO) and Control Spring
(NNN) onto the Adjusting Screw (JJJ). Check the concentricity
of the Spring (NNN), by spinning the assembly. Make sure that
the Spring (NNN) touches no parts of the Screw (JJJ) when
spinning. If the Spring (NNN) does touch any part of the Screw
(JJJ), then replace the Spring (NNN) and repeat the test. If the
Spring (NNN) is satisfactory then move to Step 56.
