① When the valve is open, the valve body shall withstand the internal pressure detection of twice the working pressure value of the valve;
② When the valve is closed, both sides bear 11 times of the valve working pressure value respectively, without leakage; However, for metal sealed butterfly valves, the leakage value is not greater than the relevant requirements. According to the connection mode, it can be divided into three types: loose flange type, fixed flange type and threaded type; According to the structure, it can be divided into single sphere, double sphere, curved sphere, etc. The tubular valve part is composed of inner and outer rubber, cord fabric and steel ring, which is formed by vulcanization and then loosely combined with metal flange or parallel joint. This product can reduce vibration and noise, and can compensate for thermal expansion and cold contraction caused by temperature changes. It is widely used in various pipeline systems. Henan Tianhao Pipeline integrates professional design ability and production technology, and has a new operation mode and technical means.
The whole business operation is completed mainly through close cooperation between R&D technicians, production technicians, professional sales personnel and after-sales management personnel. Due to the enhanced production planning and near optimal resource allocation, the company has nearly "zero inventory" management, and the inventory cost of the enterprise has also reached a relatively optimized configuration.
The joint is also called electric ball valve, flexible electric ball valve, electric ball valve of valve, shock absorber, valve shock absorber, valve expansion joint, etc. Mainly JGD type and KXT type. This product is a tubular valve part composed of inner and outer rubber, cord layer and steel ring, which is vulcanized at high temperature and high pressure and then loosely combined with metal flange or parallel joint. This product makes use of the advantages of the valve such as high elasticity, high gas resistance, medium resistance, weather resistance and radiation resistance to reduce vibration and noise, and can compensate for thermal expansion and cold contraction caused by temperature changes. It is widely used in various pipeline systems. The electric ball valve is generally composed of an inner rubber layer, a fabric reinforcement layer (the reinforcement layer has multiple layers of rubber scraped nylon cord fabric), a middle rubber layer, an outer rubber layer, an end reinforced metal ring or a steel ring, which is formed by vulcanization at high temperature and pressure, and loosely combined with a metal flange or a parallel joint. This product makes use of the advantages of the valve, such as high elasticity, high air permeability, medium resistance, weather resistance and radiation resistance, which can reduce the vibration and noise of the pipeline and compensate for the expansion and contraction caused by temperature changes. The valve product is the rubber mixture made from the valve raw material after mixing in the internal mixer as the raw material. During mixing, the formula is designed according to the characteristics of the required valve products, and the required product hardness is determined. The product is molded by the valve plate vulcanizer. After the product is formed, flash processing shall be carried out to make the surface of the product smooth without burrs.