Quick Opening Closure with safety interlock function. (Blind self-locking, shockproof, anti-loose) can be achieved when the secondary pressure relief opening. Using a paddle wheel structure, on or off simply wheel alignment wheel recesses, rotary screw 90-720 ° with a wrench to ensure an operator does not require any special tools in the case of open one minute blinds, security easy, no leakage. Shenyang Wensheng Equipment Co., Ltd. Main Products: pigging transceiver, transceivers pigging ball tube, quick open blind plate, wheel paddle fast opening blind, blind quick clamp, quick lock ring Blind plates, filter separators, gas-liquid separator, gas-solid separator, stainless steel Y-type filter, basket filter, cyclone, filter backwash, horizontal filters, vertical filters, cups pigging device, straight pigging, foam pig, support wheel pigging, pigging coating, adjustable pigging, pigging steel brush, scraper pigging, pipeline pigging, Shenyang pipeline cleaning equipment, Shenyang transceivers pigging devices, pipe cleaning equipment.