SPECIFICATION :

These are wall thimble mounting flange / flat back frame sluice gates made generally as per AWWA C560 / BS 7775/ IS13349.

APPLICATION :

These sluice gates are mounted on the face of a wall via wall thimble and are used to isolate flow in and out of a conduit. Such gates can be manufactured for seating as well as unseating head applications up to 40 meters. Flange back frame sluice gates can also be mounted on puddle pipe flange provided dimensions and hole drilling on the flange of gate frame are specifically provided to match pipe flange or vice versa.

Flange back frame sluice gates are highly recommended where maximum practical water tightness is an important criterion for the gate and hence for which a gate shop tested at the manufacturer's works for its actual leakage performance is a must.

ADVANTAGES :

Civil construction schedules can be advanced as thimbles can be made and supplied earlier for prior embedment in concrete. The sluice gate can then be mounted later when received.

The installed gate can be dismounted without breaking concrete and remounted with equal ease. This helps removal for repairs and future replacement. If required, opening can be kept sealed with a blind flange when the gate is not there.

Erection and installation procedure becomes simple and economical.

Mounting the gate through machined flanges of wall thimble and gate frame, with a gasket joint in-between, helps maintain alignment and proper contact between the mating sealing faces. This improves water sealing characteristic of the gate.

Machined back flange of gate makes it possible to mount the gate on a test bench for shop leakage testing at the manufacturer's works for verifying actual leakage and soundness of casting at operating head. This helps ensuring and verifying the specified leakage limits and ensuring required quality standards.

FEATURES :

• Wall thimble of F-shaped or E-shaped section as required.
• Rigid flange / flat back gate frame designed for mounting on face of wall thimble using studs and with a rubber gasket between gate frame and wall thimble.
• Open top frame provided with short length extension guides to retain at least one half the vertical height of the shutter when the shutter is in the open position.
• Adjustable type cast iron wedging devices lined with non-corroding metal strips / wedges. Adjustable wedges on shutter allow future on site adjustment of wedges to enable increased edging action and compensate possible wear of sealing faces.
• Offered for seating as well as unseating head applications, as required. Gates offered for seating head application provided only with adjustable side wedges whereas gates offered for unseating head application provided with adjustable side as well as top & bottom wedges.
• Non corroding metal to metal sealing faces/strips on the periphery of gate aperture for conventional bottom closure gates. Sealing faces fitted by counter sunk head machine screws on plain machined faces of frame & shutter.
• Offered with conventional bottom closing or flush bottom closing as required. Flush bottom closing gates up to 600mm height of opening provided with resilient seal fitted at the invert of gate frame and gates with height of opening higher than 600mm provided with resilient seal fitted at the bottom of shutter/slide.
• Provided with threaded stem connecting block housed in shutter to connect the shutter with the spindle. A set screw is provided to lock the stem block on the threaded bottom end of the spindle and prevent stem from unscrewing.
• Rising spindle gate with lift mechanism mounted on separate platform above gate frame to transfer thrust reaction on platform.
• Single piece or multi-piece spindle as required to connect the stem block mounted on shutter to the gate operating arrangement.
• Couplings as required to connect the multi-piece spindles.
• Adjustable type stem guide brackets as required to guide the spindle.
• Manual lift mechanism to enable a single person to operate gate with effort less than 20Kgs.
• Anchor bolts with nuts and washers as required for frame extension guides, stem guide brackets and pillar of lift mechanism.
• Offered with painting as required by the client or as stated in out standard painting table.

MATERIALS OF CONSTRUCTION :

Depending on application and requirement, the client may select and specify the material of construction for various components from the alternatives stated in out materials table.

SHOP TESTING PARAMETERS :

• Leakage test at operating pressure for gate leakage performance.
• Hydrostatic body test at 1.5 times the maximum operating pressure for soundness of castings.
• Movement test for checking interference free movement of complete gate assembly.
• Seat clearance check for checking clearance between mating sealing faces.