Instruction Manual for F1300/1600 Mud Pump
16
relief valve and the manifold. Pipe the discharge end of the relief valve directly into the mud pit with
seamless steel pipe as few turns in the line as possible. If the turn must be made, the elbow should
be over120º. IT IS NOT RECOMMENDED for the discharge end of the relief valve to be piped into the
suction line of the pump.
The mounting for KB-75 pulsation dampener (1) is a flange with R-39 seal washer. Before installing
dampener, thoroughly clean ring groove and ring, and after setting dampener into place, tighten the
nut (8) with 950-1265N.m (700-935ft.lbs) torque. Tighten nuts in a criss-cross order.
Both sides of discharge four-way joint are R-27 seal washer flange. Before installing, thoroughly clean
gasket and groove. Connect the bolt and the nut with 495-660N.m
（
365-490ft.lbs
）
torque, tighten
nuts in a criss-cross order.
Precharge air or N2 to dampener before starting up pump. See details in “Dampener assembly”
section.
Fig.10 KB-75 Dampener assembly
(1)
Gasket ring (2) bottom plug (3) bladder (4) shell assembly (5) cover (6) tee joint (7)
Joint(8)shield of pressure gauge (9) exhaust valve (10) pressure gauge (11) stop valve (12) Washer
(13)Balance disc (14)Press plate (15)Spring washer (R
1
) stud (R
2
) nut (R
3
) stud (R
4
) nut
1.7. Dampener Assembly
Correct installation and usage of dampener can availably reduce the pressure fluctuation of discharge
system therefore obtaining smoother fluid. For the sake of acquiring long life span of dampener,
usually make pressure of pump and precharge pressure of bladder to keep the suggestion proportion.
It should not be more than 2/3 of the pump discharge pressure, or a maximum of 4.5Mpa. (650psi).
1.7.1 Installation (see Fig.10)
The structure of KB-75 dampener is shown in Fig.10. The pad eyes installed on the pressure gauge
