维修第一和第二止回阀
Servicing the First and Second Check Valves

　　注意：维修之前，要确保水路已经关闭或关闭阀已经关闭。
　　NOTE: Before servicing be certain water is turned off or shut-off valves are closed

1. 关闭阀门上下游的关闭阀。
   Close shut off valves up and downstream of the valve.
2. 采用大小适中的扳手，松开止回阀盖。旋下止回阀盖螺丝并拿起。
   Using an appropriate sized wrench, loosen the check valve cover. Unscrew the check valve cover and lift off.
3. 拆卸弹簧。
   Remove spring.
4. 从阀体上取出阀瓣固定器总成。
   Lift out disc holder assembly from body of valve.
5. 将阀座阀瓣颠倒，旋下阀瓣螺丝，从阀瓣固定器总成上拆卸阀瓣垫圈和阀瓣橡胶。将橡胶颠倒，使其反面朝上。将阀瓣螺丝穿过阀瓣垫圈和橡胶，安装到阀瓣固定器上。
   To reverse the seat disc, unscrew disc screw and disassemble disc washer and disc rubber from disc holder assembly. Reverse rubber so opposite face is showing. Assemble disc screw through disc washer and rubber and screw into disc holder.
6. 为了更换阀座模块，通过抓住加强环将其拔出阀体。用新组件更换阀座模块，将其放置到阀体阀座镗孔内。紧固阀盖使得阀座正确嵌入。
   To replace seat module, pull out of body by gripping at reinforcement ring. Replace seat module with new component by placing into body seat bore. Tightening cover will engage seat properly.
7. 将阀瓣固定器总成插回到阀座模块内。
   Insert disc holder assembly back into seat module.
8. 更换弹簧，确保其正确位于阀瓣固定器上。
   Replace spring insuring that it seats properly on disc holder.
9. 将阀盖放置在弹簧及其内置阀盖上的引导装置，定位内置末端线圈。
   Place cover onto spring with internal guide on cover positioned inside end coil.
10. 用螺丝将阀盖固定在阀体上。
    Screw cover onto valve body.
11. 用扳手将阀盖锁紧。
    Tighten cover wrench tight.
12. 开启关闭阀。
    Open shut off valves.

DN15 - DN50维修组件
¹/₂" – 2" Repair Kits

订购时，请指定订购编号，组件编号和阀门通径
When ordering, specify ordering code number, kit number
and valve size