KSA 900/1500 wall penstock



KSA 900-1500 range penstocks are designed for the flow control and isolation of fluids associated with water, sewerage, wastewater treatment plants, power generation, irrigation schemes and process plants. 

Featuring a non-rising spindle, the KSA 900-1500 penstock is ideally suited to installation in a manhole or other confined space.

The KSA 900-1500 penstock mechanism can be can be fitted with several types of  operating gear, either manual (handwheel, bevel drive gearbox) or power driven (electric actuator). Please enquire for further details.

Another advantage of this mechanism is that it requires practically no maintenance. The nut of the non-rising screw is made from POM, a naturally self-lubricating material, thereby avoiding the risk of oxidation, cold welding, etc. and the need for lubrication.



The KSA 900-1500 penstock is made mainly from grade 1.4401 (316) stainless steel and HDPE. This mixed construction makes for a lighter penstock, easier to install and to operate than ductile iron or all stainless penstocks (less effort being required to open and close it).

These materials along with the EPDM used for the seal give the penstock a long service life even in harsh environments with only minimum maintenance being required.

Due to its design the KSA 900-1500 penstock performs equally well under both seating and unseating pressures and will stand a pressure of 0.5 bar or 5 metres head. 

The KSA 900-1500 penstock is available for nominal diameters of 900–1500mm. For smaller diameters see the KSA 100-800 range and for bigger diameters or special applications, please enquire for a custom quote.



Installation / Application


Penstock installation is made easy by the chemical anchors supplied with the valve.

The fastening points are located around the valve opening, not on the frame. A smaller surface area is therefore required to fit the valve to. 

To install, follow the fitting instructions that come with the penstock.

Place the penstock level; check the concrete support is absolutely flat.

Mark out the holes and drill the concrete support.

Blow out the holes and insert the phials of chemical.

Install the stud bar attachment on the drill. After greasing the end of  the stud bar, use the drill in percussion mode to insert the stud bar in the hole, breaking the chemical phial. Never insert the stud bar with a hammer. Repeat the operation for the other holes.

Observe the necessary setting time (information supplied in the fitting instructions).

Position the penstock, fit the washers, then screw everything up tight.


ND mm D mm A* mm B mm C mm E mm No. turns Torque Nm Weight kg Pressure (bar)
900 900 1360 2223 165 160 160 102 128 0,5
1000 1000 1490 2438 175 175 176 124 160 0,5
1100 1100 1660 2894 195 130 193 150 180 0,5
1200 1200 1660 2894 195 150 210 176 208 0,5
1250 1250 1660 2894 195 130 218 192 221 0,5
1500 1500 1910 3394 215 130 260 272 330 0,5

* A = total width