Internal stem/disc drive eliminates the need for pins or bolts which create additional leak paths and turbulence in the waterway that reduces flow.

• 内部阀杆/蝶板驱动,排除了对销钉或螺栓的需求。销钉或螺栓会产生额外泄漏通道,以及在水路内产生妨碍流体运动的涡流。