Split Disc® Check Valves Wafer Style Installation
Instructions
895 2” thru 24”
Flomatic Corporation
Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801
Phone: 518-761-9797 Fax: 518-761-9798 www.flomatic.com
895
Rev. A (11/16)
Operation:
Flomatic 895 Split Disc® check valves are normally installed downstream of a pump. Upon pump shut down
the torsion spring closes the discs before the water reverses flow. This will prevent flow reversal slam, which
helps to eliminate water hammer and system surges associated with valve closure. On start-up, the water
forces the discs open and allows water to pass thru the valve. The only moving parts are the discs and
spring, which are guided in the valve body by the hinge pin and stop pin to prevent the disc from slamming
together.
Installation:
Installation must be performed by qualified, licensed personnel only.
Remove all packing materials from the valve, this includes anything that keeps the valve from being
damaged during shipping.
The Flomatic 895 Split Disc® check valve can be installed vertically (flow up only) or horizontally.
NOTE
:
When installing the horizontally it MUST be installed with the disc hinge pin (4) and stop pin
(5) in the vertical position (see diagram on next page)
. The valve must be installed with the flow arrow on
the tag pointing in the direction of flow when the system is in operation. Three diameters of straight pipe
upstream of the valve are recommended to prevent turbulent flow thru the valve, which will cause vibration
and wear. Valves must be mounted between ANSI B16.5 flat face flanges with 1/16 min thickness ring
gaskets. Centering the valve properly is important to prevent damage to the valve and/or leakage. Never lift
the valve by the discs. Hand tighten, then torque the bolts using the cross-over flange bolt tightening method.
This will load the bolts evenly and help eliminate concentrated stresses. When using in series with a butterfly
valve it must be installed at
least
one pipe diameter downstream of the Split Disc® due to the fact that the
disc extend beyond the valve body.
Valve Size (in)
Bolt Diameter (in)
Bolt Torque
(ft/lbs)
Valve Size (in)
Bolt Diameter (in)
Bolt Torque
(ft/lbs)
2
5/8
25-75
10
7/8
60-180
2.5 5/8
25-75 12 7/8
65-200
3
5/8
25-75
14
1
80-250
4 3/4
25-75 16
1 90-300
5
3/4
40-120
18
1-1/8
100-350
6 3/4
40-120
20
1-1/8
120-450
8
3/4
50-150
24
1-1/4
150-500
Maintenance:
The Flomatic 895 Spilt Disc® check valve should be inspected yearly for damage or leakage by a qualified
and licensed person only. Leakage can be checked for by listening for noise when the pump is shut down. If
there is visible damage or leakage to the valve or internal leakage sounds isolate the valve, relieve the
pressure, drain the water from the line and remove the valve. If the resilient seat is damaged the valve must
be replaced.
Disassembly / Reassembly:
The Flomatic 895 Spilt Disc® check valve can be disassembled by removing the hinge pin retainer (7). Next
drive out the disc hinge pin (4) with a small rod bar while holding the torsion spring (3) down to keep it in
place. Lift the discs (2) and bearings (6) from the valve. Inspect the disc (2) the pins (4&5), bearings (6) and
valve body for signs of wear or damage. Replace parts as needed. If the valve seat is damaged the valve
must be replaced as this will cause leakage.