Waterproof fire closed doors Coal waterproof closed doors waterproof fire closed doors closed doors watertight door Waterproof closed doors Waterproof closed doors factory in Shandong waterproof closed doors of St. coal waterproof closed doors underground waterproof closed doors waterproof closed doors lowest to the force, the most prosperous, the most fashionable, most Niubi waterproof sealed door closed doors in Shandong's coal producers, Shandong's coal stand the test of the credibility of the factory is full of Shandong's coal, then so what, do not hurry to call Tel 0537-3879059,18369707066 Shandong's coal waiting for your phone a waterproof product uses closed doors closed doors for the main substation and the main underground drainage pumping stations leading to the shaft bottom of the channel within easy shut down to prevent sudden immersed in water. Second, waterproof closed doors models, specifications, technical parameters of the maximum pressure of the closed door 98KPa. Press the cave mouth is divided into four size specifications, as follows: No. Model Specification Drawing No. 1 MMB1.4 × 1.8 B85-373 (1) 2 MMB1.6 × 1.8 B85-373 (2) 3 MMB1.8 × 2.0 B85 -373 (3) 4 MMB2.1 × 2.0 B85-373 (4) Third, waterproof closed doors Product Description The closed doors of the Ministry of Coal Industry design, product quality standards and testing standards strictly enforced Q / WMS-3010-2005 "closed door. " Fourth, the main structure of the product waterproof closed doors 1, the flat steel doors closed doors, Tic-Tac-ribs, ring beams welded and other groups. 2, the frame for the channel, beam composite frame member. 3, the tensioning device is a wedge-shaped wedge slider. 4, the hinge rolling bearing support. Shandong's coal mining industry, mining machinery factory mainly produces special doors, manufacture the following products: closed doors, waterproof airtight doors, fire and fence dual doors, door impact Bomi, anti-shock valve, no pressure damper, air shaft explosion-proof doors, Inclined wells blast doors, water gates, doors refuge chamber, mine explosion doors, mine gate