It also has impact strength at low temperature, which increases hydrostatic strength and chemical resistance. PPH pipes shall be protected from long-term sunlight as far as possible, and PPH pipes without grooves shall be protected from direct sunlight during construction to prevent thermal deformation. When PPH pipes are stored, handled and transported, they should be loaded and unloaded with belts, slings or slings. There should be at least two nodes when lifting.

When metal clamps and hangers are used for pp pipes, soft material gaskets shall be used between the metal clamps and pipes. Pp tube The welding and cooling process is the same as that of socket welding. Connect the outer surface of the pipe with the inner surface of the pipe, place the surface in the mold of the welding machine at the same time without rotation and heat it for a few seconds, then quickly take out the welding machine, put the heating pipe into the pipe fittings quickly and vertically, and carry out the connection process of pressure maintaining cooling.

When extruding the frpp tube, the screw is driven by the motor through the gear wheel box to rotate. The rotating screw takes materials from the feeding port, usually loose flake, powder, and granular solid cold materials, Frpp pipe The composition of the extrusion auxiliary machine is determined according to the type of products. The auxiliary machine is composed of the head, the shaping device, the cooling device, the traction device, the cutting device and the coiling or stacking device of products.

PP air duct has good electrical performance and high-frequency insulation, and can be used normally in humid environment without being affected by the environment. PP air duct It can be used at about 100 ℃, and has good electrical performance and high-frequency insulation, which is not affected by humidity. However, it is easy to become brittle at low temperature, is not wear-resistant and easy to age, and is suitable for making general mechanical parts, corrosion resistant parts and insulating parts.

During the processing, it is easy to migrate from the inside of the polymer to the surface, and the polar groups are oriented at the interface. The polar groups are oriented towards the surface of the metal processing machine, forming a lubricant molecular layer with low cohesive strength through physical adsorption or chemical bonding, thus reducing the friction between the frpp tube and the processing machine, and preventing the frpp tube from adhering to the mechanical surface.

It is installed in all kinds of water supply and drainage pipelines, especially suitable for two-way sealing and places where the valve body is easy to rust. PP butterfly valve is used to control the flow of medium and make and break. The connection between the butterfly plate and the valve rod adopts a pin free structure to understand the possible internal leakage point; The outer circle of the butterfly plate adopts spherical shape, which improves the sealing performance.

Ball valve and flange door belong to the same type of valve. The difference is that when it is closed, it is a ball. The ball rotates in the center line of the body to realize opening and closing. The PP ball valve line is mainly used for cutting, distributing and changing the flow direction of media. Two types of ball valves and three types of ball valves are widely used for installation.

When used at relatively low temperature, any pipe must be insulated, otherwise it will freeze and crack due to volume expansion caused by freezing. PP pipes are connected by hot-melt connection, so there is secondary heating, which will accelerate the aging of pipes, thus forming weak points in the pipeline system and reducing the service life of PP pipes.

PP air duct can be dissolved in the colored resin, and the pigment is generally inorganic compound, which is insoluble in the colored medium. Its coloration is dispersed in the colored medium through its own highly dispersed particles, and its refractive index is greatly different from the matrix; Lubricant, antistatic agent, foaming agent, flame retardant and mildew inhibitor are sometimes added to PP air duct for use and molding.

The main features of PPH ball valve are compact structure, reliable sealing, simple structure and convenient maintenance. The sealing surface and spherical surface are always closed, not easy to be eroded by media, and easy to operate and maintain. Clean it before assembly and lubricate it with grease. The lubricating grease shall be compatible with PPH ball valve metal materials, rubber parts, plastic parts and working media.

PP butterfly valves are often installed and used on large-diameter low-pressure pipelines. According to the sealing type of butterfly valves, they can be divided into pneumatic soft sealing butterfly valves, pneumatic hard sealing butterfly valves, pneumatic self sealing butterfly valves, etc; According to the classification of pneumatic actuators, it can be divided into double acting pneumatic butterfly valve and single acting pneumatic butterfly valve.

PP ball valve is mainly used to cut off, distribute and change the flow direction of media in the pipeline. It needs to rotate 90 degrees to close tightly with a small rotating torque. As the electric device in the electric valve is an electromechanical device, its use status is greatly affected by its use environment.