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DISASSEMBLY OF RV STYLE SINGLE DIRECTION RELIEF VALVE AND BV STYLE BI-
DIRECTIONAL RELIEF VALVE
Refer to the sectional drawing shown in Figure 5.7 and Figure 5.8.
1. Turn off pump and lock out energy source to driver.
2. Close inlet and discharge valves.
3. To drain pump, follow the procedure in Section 7, INSTRUCTIONS FOR DRAINING PUMP.
4. Decrease pressure on spring (29) by loosening lock and seal nut (27) and unscrewing adjusting screw (26)
until adjusting screw turns freely.
5. After decreasing pressure on spring (29), remove the relief valve cap (24) by unscrewing it from faceplate
(23B).
6. Remove spring (29), poppet (30), spring washer (32), and spring guide (28).
7. Inspect all parts and replace worn or damaged parts as required.
ASSEMBLY OF RV STYLE SINGLE DIRECTION RELIEF VALVE AND BV STYLE BI-DIRECTIONAL
RELIEF VALVE
Refer to the sectional drawing shown in Figure 5.7 and Figure 5.8.
1. Install poppet (30) into faceplate (23B).
2. Install spring (29) into faceplate (23B) making sure spring is centered on poppet (30) and resting on spring
washer (31).
3. Place pilot of spring guide (28) into I.D. of spring (29).
4. Screw adjusting screw (26) with lock and seal nut (27) assembled into hole in relief valve cap (24).
5. Place small end of adjusting screw (26) in hole in spring guide (28) and screw relief valve cap (24) into
faceplate (23B).
6. Adjust relief valve by following steps shown in how TO ADJUST THE RV STYLE RELIEF VALVE.
TO ADJUST THE RV STYLE SINGLE DIRECTION RELIEF VALVE OR BV STYLE BI-DIRECTIONAL
RELIEF VALVE
Refer to the sectional drawing shown in Figure 5.7 and Figure 5.8.
WARNING! Take necessary precautions to prevent personal injury or physical damage that could be
caused by any loss of the product being pumped while adjusting the relief valve. DO NOT adjust the
relief valve without coupling guards in place.
The relief valve must be adjusted under conditions identical to the operating conditions (viscosity, rpm, etc.)
1. Connect a pressure gauge near pump in discharge line between pump and point where discharge line will
be closed.
2. Loosen locknut (27) on the adjusting screw (26).
3. Back adjusting screw (26) out to point where end of adjusting screw will be 1-3/4 inches [44.5 mm] from
plug cap (24). See RELIEF VALVE drawings shown in Figures 5.7 and 5.8.
4. WARNING! DO NOT start the pump until all rotating shafts and couplings are properly guarded. After all
rotating shafts and couplings are properly guarded, start the pump and close the discharge line slowly.
DO NOT exceed the pressure rating of pump or other equipment between the pump and the discharge
line valve. If this pressure is reached while closing the discharge valve, DO NOT close any further. DO
NOT run the pump with a closed discharge line for more than one minute at a time.
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