Split Disc® Check Valves Wafer Style Installation Instructions
895 2” thru 24”
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)
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.
Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801
Phone: 518-761-9797 Fax: 518-761-9798 www.flomatic.com
Bolt Torque
(ft/lbs)
Flomatic Corporation
Valve Size (in) Bolt Diameter (in)
Bolt Torque
(ft/lbs)
895
Rev. A (11/16)
Split Disc® Check Valves Wafer Style Installation Instructions
895 2” thru 24”
Before reassembling the valve make sure all parts and cleaned and free of dents, bends and debris. Make
sure the valve is sitting flat with the resilient seating surface facing up. Place the discs (2) (seating surface
down) in the valve, while aligning the disc lugs with the hinge pin (4) holes. Insert the hinge pin (4) into the
valve then place the half of the disc bearings (6) between the valve body (1) and discs (2). Slide the Hinge
pin (4) thru the disc bearings (6) and the discs (2). Place the torsion spring (3) between the discs (2) and
push the hinge pin (4) thru the torsion spring (3) and the other side of discs (2). Insert the rest of the disc
bearings (6) between the discs (2) and valve body (1). Finish pushing the hinge pin (4) thru until it stops
against the stop pin retainer (8). Place the hinge pin retainer (7) back in the valve body (1) and tighten.
Trouble Shooting Guide
Problem: Possible Solutions:
Valve chatters or vibrates Make sure the velocity is at least 4 feet per second. Noise that
sounds like rocks in the line can be cavitation from high velocities
or low downstream pressure. Make sure there is 3 diameters of
straight pipe upstream of valve.
Valve leaks If the seat ring is lifted above the flange face – the mating flange
and gasket are not seated correctly. Re-align the valve and
gaskets and tighten the bolts according to the torque chart. Also
make sure that the correct size gaskets are being used.
Water does not flow thru valve Check to make sure the arrow is in the direction of flow. Verify that
the downstream isolation valve is open and there is no blockage
preventing flow.
Valve Slams Remove the valve from the line and check the spring. Replace
wore or damaged spring. If necessary consult the factory about
purchasing a heavier spring for your conditions.
Information needed to order repair parts:
Valve Model Number
Valve Size
Valve working Pressure
Limited One Year Warranty: Flomatic valves are guaranteed against defects of material or workmanship when used for the services
recommended. If, in any recommended service a defect develops due to material or workmanship, and the device is returned, freight
prepaid, to Flomatic Corporation within 12 months from date of purchase, it will be repaired or replaced free of charge. Flomatic
Corporations’ liability shall be limited to our agreement to repair or replacement of valve only.
Flomatic Corporation
Flomatic Corp, 15 Pruyn’s Island, Glens Falls, New York 12801
Phone: 518-761-9797 Fax: 518-761-9798 www.flomatic.com
Rev. A (11/16)
895
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