World Chemical型式
VK型 比重1.1用
可槽内、外使用
*适用于洗涤塔等循环用泵浦
VP型 比重1.4用
高压泵浦用，广泛用于印刷电路板蚀刻设备
材质
CFTPP(碳纤维强化聚丙稀塑胶)
GFTPP(玻璃纤维强化聚丙稀塑胶)
特征
①本体使用耐高腐蚀性塑胶，耐热耐腐蚀性佳，使用于多种药液。
②采新设计之特殊药片构造，可抑制空气吸入。
③无轴封构造，没有因发热、磨损等引起之故障。少量之颗粒亦不受影响。
④由成形零件组成，尺寸精度高，从低压到高压效率表现佳。
⑤标准配备之逆止轴封，能有效解决泵浦停机后液体逆流产生之短暂漏液现象。
⑥干式轴封，能有效解决废气问题（选择配备）。
⑦铝合金马达及塑胶底座组合，达到轻量化、底座防蚀效果。
使用用途
①蚀刻用喷洗泵浦。
②废气洗涤塔用循环泵浦。
③反映槽、混合槽之循环输送泵浦。
④无电解镍液、一般电镀液、过滤器、热交换器之循环搅拌用泵浦。
⑤更新药液之抽送泵浦。
Gas Seal Mechanism
The gas seal mechanism prevents contamination inside the pump chamber by sealing has produced from the chemical within the pump. This mechanism also places a dry seal made of rubber in the shaft to protect the motor and the atmosphere of an operational environment.
During operation, the tip of the dry seal lip moves by centrifugal force, and rotates without contact. At the same time, it prevents the leakage of gas and the lip closely adheres during stop to seal gas. Moreover, any leaked gas is immediately released by ventilation, and the oil seal firmly guards the motor bearing. In this way, the service life of the pump and operation environment is protected from gas contamination by the triple gas seal mechanism.
Resistance to Chemicals
The main body of DRYFREE is composed of a carbon fiber reinforced polypropylene (CFR PP) resin, which resists corrosion from a wide range of chemicals. It is also constructed keep metallic parts from contacting the liquid. This unique design combined with the resin construction enables the pump to withstand a much wider range of chemicals than conventional vertical pumps.
Resistance to Heat
CFR PP is not only resistant to corrosion but is also resistant to heat. DRYFREE, which uses this resin for the main body, stands out as an excellent heat-resisting performance pump among the high corrosion resisting chemical pumps.
Sealless Construction
The key to sealing liquid in a pump without incorporating a seal in the liquid that passes inside the pump and the impeller construction. We have successfully developed "Liquid Seal" by utilizing viscosity, pressure and frictional resistance of the liquid, and by balancing the pressure with the unique impeller construction.
The impeller construction is designed so that the pumping blades are located on the front of the impeller main plate, seal blades on the rear, and the protrusion rings on the outside of the seal blades. In addition, the outside diameter of the impeller main plate is larger than the diameter of the protrusion rings. The liquid, which moves to the shaft by the internal pressure during operation, is stopped by pressure in the opposite direction of the protrusion ring and seal blade, and works as liquid seal. When a great resistance is applied on the suction side, air is liable to be sucked from the axial direction. However, liquid frictional resistance is produced between the pressure-balanced liquid and the impeller main plate, the protrusion ring and casing fixed, wall, which prevents air from being sucked to obtain a high vacuum.
Reducing Air Entrapment and Improving Suction Performance
The problem of "air lock", liable to conventional sealless pumps, has been successfully solved in the DRYFREE through the adoption of a new impeller design. First, minimizing the size of the seal blade has reduced the loss resistance. Second, providing barrier walls such as protrusion rings have further reduced air entrapment. This new construction is useful in increasing the airtightness within the pump, and in improving stable suction performance.
The new construction has other additional advantages. It is capable of pumping high temperature fluids that were difficult to pump because of maximum vapor tension, and can cope with suction side piping that has great loss resistance.
Strong Against Dry Running
Constructed without parts such as mechanical seal and bushing, DRYFREE will not generate heat when it runs dry. The pump has no consumable parts and is even capable of handling small amounts of slurry.
