Pneumatic pressure pump composition and principle: 1. The gas part of this part consists of a light-weight piston with an O-ring and an outer glass fiber wound or hard aluminum coating, the middle with epoxy resin filled sleeve composition , The piston is placed in the sleeve. The diameter of such an air piston is constant for any series of pneumatic pumps. When compressed air is delivered to the pneumatic device, the piston is forced into the compression stroke and the air-driven piston returns to the suction stroke (except for the M Series pumps with spring return capability). Unlike many other pumps, pneumatic liners eliminate the need for lubricants due to the inherent low friction characteristics of Haskel's design and assembly lubrication. 2. Hydraulic partial pressure device piston / plunger directly connected with the piston, the lower end into the hydraulic device within the housing. Its diameter determines the pump's compression ratio, which determines the output flow and maximum pressure. Its function is to suck the liquid through the inlet control valve and to flow it out through the outlet control valve at higher pressure. The unit is equipped with a spring-loaded check valve to control liquid access. When the piston / plunger of the hydraulic unit is in the intake stroke, the inlet control valve opens and the outlet control valve, when closed by the spring, introduces the fluid into the pump. During the boost stroke, the inlet control valve is closed and the piston / ram of the hydraulic unit forces the fluid out through the outlet control valve. The dynamic seal is located around the piston / ram of the hydraulics and is a nearly wear-free part. Its function is to contain liquid under pressure during circulation and to prevent external leakage or penetration into the gas installation. According to the pumping liquid medium, the use of temperature and pressurization ratio, the choice of a different sealing materials and forms. Note: Most Haskel pumps use a positioner between the pneumatic part and the hydraulic part to allow complete separation and contamination-free operation. 3. Air Circulation Valve This section consists of a controller and a plunger that allows compressed air to flow to either end of the air piston depending on the position. The piston pushes the control valve at the upper and bottom of its stroke to alternately pressurize and ventilate the large area of ​​the slide valve to control the reciprocating motion of the air flow to the air piston to maintain the circulation state. When the air is expelled from the pump, it must pass through the exhaust muffler. Unlike many other pumps, Haskel pumps are not designed with a metal-to-metal fit, which prevents the consequences of a leak on the end-of-plunger operation. Spread read:
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