Feed screws – the heart of the pump

螺桿——泵的核心

-Selection of screw (pitch size)

螺桿的選擇（螺距大?。?/p>

-dependinging on flow rate and differential pressure

-綜合考慮流量和出口壓力

-The higher the pressure the smaller the screw pitch size (proportional pressure build up)

-更高的出口壓力，選擇更小的螺桿間距

-The higher the volume flow the bigger is the screw pitch size

-更大的流量，選擇更大的螺桿間距

-The smaller the screw pitch size the better is the suction power

-螺桿間距越小， 自吸力越強(qiáng)

-Shear senstive products need more closed chambers to reduce backflow

-剪切敏感產(chǎn)品選擇更小的密封腔減小回流剪切

-Abrasive products need low rpm and sufficient closed chambers for min back flow/slippage over  the clearance

-磨蝕性產(chǎn)品需要降低運(yùn)行轉(zhuǎn)速，并且足夠小的密封腔，減小回流和運(yùn)行的磨損

Screw pitch size selection is the key for trouble free operation

選擇合適的螺桿是確保泵平穩(wěn)運(yùn)行的關(guān)鍵