Specifications

DIRECTION OF ROTATION FOR THE RV STYLE RELIEF VALVE

The drawings showing DIRECTION OF ROTATION FOR PUMP CONFIGURATIONS USING THE RV STYLE

RELIEF VALVE and position of relief valve with the letter “L” in the designation are for low drive applications (the

drive shaft is lower than the side port). All other drawings shown in Figures 5.4 and 5.5 are for high drive

applications (the drive shaft is above the side port).

The arrow in the drawing at the end of the drive shaft indicates the direction of rotation needed to achieve proper

operation of the pump and relief valve when using the pump and relief valve orientation shown in the drawing. CW

indicates clockwise rotations and CCW indicates counterclockwise rotation when viewed from the drive shaft end

of the pump.

To determine the correct relief valve position for any of the pump orientations, use the drawings shown in Figures

5.4 and 5.5 titled DIRECTION OF ROTATION FOR PUMP CONFIGURATIONS USING THE RV STYLE RELIEF

VALVE:

1. Find the group of drawings with the proper drive shaft position (high or low drive). Drawings with W, Z, X,

or Y rotation are high drive pumps. Drawings with LW, LZ, LX, or LY rotation are low drive pumps.

Eliminate all other drawings.

2. In the drawings remaining, find the group of drawings with the proper direction of rotation arrow at the end

of the drive shaft. Eliminate all other drawing. CW indicated clockwise rotation and CCW indicates

counterclockwise rotation when viewed from the drive shaft end of the pump.

3. In the drawings remaining, find the group of drawings with the proper port positions (straight through or

right angle). Eliminate all other drawings.

4. In the remaining drawings, find the drawing with the proper inlet and discharge port locations. This drawing

will show the proper relief valve position for the pump configuration chosen. Note the position of the word

“INLET” cast on the side of the relief valve faceplate. The word “INLET” must be on the inlet “side” of the

pump in order for the relief valve to work properly. The discharge and inlet “sides” of the pump are always

directly opposite each other; the top port of the right angle pump is connected to the “side” of the pump via

an internal passage.

Figure 5.3