Gate seal, also known as p-type rubber water-stop, gate seal is an important part of the gate hydropower project is to ensure hermetic sealing water gate, key components of normal operation. Gate seal material can be selected according to the specific conditions of head height and size of the aperture, the most common way to rubber gate seal. 2 classification from seal Material: rubber seal is made from natural rubber (synthetic rubber) by mixing equipment (open mixing machine or mixer) segmented masticated, mixed with special antioxidant, a vulcanization accelerator, After curing aids, reinforcing agents, plasticizers, and a dozen semi-finished raw materials obtained mix, and then placed in a certain mold cavity, the curing press at high temperature and pressure conditions in the system conforms to the water Workers seal element integrated steel gate sealing requirements, commonly known as common seal. The low friction, high wear resistance of PTFE film composite to seal Face seal is called rubber composite seal, PTFE film for uninterrupted work surface is not segmented overall, and enhanced Face teflon-coated seal known as non-festival-type rubber composite seal; currently the only can be done no matter how long PTFE tape continue to develop and adopt strict national standard one meter thickness with PTFE composite seal manufacturer of Sanmenxia Hydropower Rubber Products Co. rivers, the high-strength nylon canvas placed rubber seal for enhanced, low friction, wear-resistant seal doubling the folder called high-strength nylon canvas seal; both plus and added high-strength nylon canvas PTFE film (or teflon coating) of water seal folder called high-strength nylon canvas rubber composite seal; the polyvinyl fluoride and polyethylene extrusion obtained The seal called pure plastic seal; a metallic material obtained seal said metal seal. In type into conventional seal, pressed type seal, hydraulic telescopic seal. On the gate installation gate seal their quality is the key to the problem is possible to seal the entire gate, a lot of water and electricity installation unit procurement is very strict on the shutter, embedded parts and other bulky items, but rather a problem in gate seal do not pay attention, after causing millions of completion of the project because a gate seal and leakage can not hand over even default. Ministry of Water Resources commissioned the company to produce excellent water gate seal of enterprises in the evaluation assigned. Only Sanmenxia Hydropower Rubber Products Co., a river was adopted recommended.