Jash Engineering Ltd. Supplies F.R.P. 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 F.R.P. Slide Gates are fixed facing the wall. These can regulate flow into a conduit. These are applicable for seating heads up to 5 meters. These F.R.P. Slide Gates feature a flat back frame design offering direct mounting on wall. These are made of corrosion resistant material. These are light in weight and easy to install.