Jash Engineering Ltd. Supplies Fabricated Slide Gates. Jash Engineering Ltd. Is an ISO 9001 manufacturer of Water & Sewage Control Gates, Shut Off Valves for Bulk Solids and Cast Iron T-Slotted Plates. The Fabricated Slide Gates are housed on facing the wall. These are applied in regulating flow into a conduit. These Slide Gates are suitable for seating heads up to 5 meters and feature flat back frame design offering direct mounting on wall.