Volume 8 – Mechanical and Electrical Services - Malaysia Geoportal

Chapter 2 GATE DESIGN
5.0 Fully Opening of Gate, In Continuous Operation, From Fully Closed Position
The purpose of the test is to verify:
a) Gate is capable of opening completely from fully closed position.
b) Gate is capable of stopping automatically after reaching the fully opened position.
c) The operating speed of gate from fully closed position to fully opened position is around
300mm/min.
Procedures of the test are as follow:
a) Gate is in fully closed position.
b) Switch the Local/Remote/Scada selector in MCC panel to “LOCAL
c) Switch on the “OPEN” push button in Local Control Panel. The hydraulic system will be energized
to make the hydraulic cylinder to open the gate.
d) Measure the gate operating time from fully closed to fully opened position. Operating speed can
be determined by dividing total operating time with 4m distance.
e) Let the gate stop automatically.
f) Check the position of gate to confirm that gate is in fully opened position. In fully opened
position, the gate shall sit on the top of gate seat.
6.0 Operation of Gate by Using Hydraulic Hand pump
The purpose of the test is to confirm the functioning of the manual hand pump mechanism.
Procedures of the tests are as follow:
a) Open the gate by using hand pump which is located on the Power Pack of the hydraulic unit. The
gate shall be lowered down by at least 150mm height.
b) After this, close the gate by using hand pump. The gate shall be raised up by at least 150mm
height.
7.0 Leakage Test
The purpose is to verify that the leakage shall not exceed 0.15 litre per second per metre perimeter
length of seal.
Procedures of the tests are as follow:
a) Raise the gate until fully closed position.
b) Place the stoplog leaves insides the downstream stoplog grooves.
c) Then, pump out the water between the gate and downstream stoplog.
d) Measure the leakage water for 5 minutes, the allowable leakage should be less than 637 litres.
2A-10 March 2009