Watts LF909 Pequeno Serie Manual De Instalación página 5

Servicing First and Second Check Valves
NOTICE
No special tools are required to service the check valves.
1. Remove the four screws holding the first check valve cover.
2. Lift off the first check valve cover. The check valve comes out
with the cover and is attached with a bayonet type locking
arrangement.
3. Holding the check valve module in both hands, rotate the
assembly quarter turn. This disengages the disc assembly,
spring, and seat cover into individual components.
4. Clean and reassemble the disc assembly or, depending upon
its condition, discard and replace it with a new assembly from
the service kit. O-rings should be cleaned or replaced as
necessary and lightly greased with the FDA Approved silicon
grease which is also furnished with the service kit.
5. Reassemble the check valve module in the reverse order.
Service is identical for both the first and the second check
valves.
For further details contact your local technical sales
representative.
Relief Valve
Service Parts Kit
Body
The springs and covers of the first and second check valves are
not interchangeable. The heavier spring loaded module should be
in the first check and the lighter in the second check module.
First Check
Service Parts Kit
Second Check
Service Parts Kit
Cover
Cover
O-ring
Spring
Assembly
O-ring
First Check
NOTICE
Disc
Seat
Seat
Second Check
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