Flomatic 80DI-VFD Installation Manual

Submersible Pump Check Valves Installation Instructions

Models 80DI-VFD 2” thru 12”

Operation:

Flomatic 80DI-VFD check valves are designed to prevent backflow, minimizing hydraulic shocks and give years of
trouble-free operation without maintenance when installed properly and sized to the pumpin g application with regards to
flow and maximum system pressures.

Construction:

The Flomatic 80DI-VFD check valve body has been constructed to handle the rated system flow and pressures as
stated, and in addition support the weight of the submersible pump, pipe and the water in the riser pipe. In addition, the
valves have been uniquely designed to absorb some of the hydraulic water shocks associated with well wat er pumping
when the check valve installation instructions are followed below.

IMPORTANT INSTALLATION INSTRUCTIONS

It is very important to install a check valve properly to help insure a trouble free water system. If the installation

instructions are not followed or the valve is disassembled, warranty or any warranty claims will be void. On the

back of this page is a diagram of a typical submersible valve installation (Fig. 1).

A. Pipe Flow Velocities: Flomatic 80DI-VFD is designed for both low and high flow conditions. For best service life a normal flow

velocity range is 1 to 10 feet per second.

B. System pressure: It is important to take the total system hydraulics into the calculation and not only the pump’s well setting

when selecting valve type and model. In general, Flomatic 80DI-VFD valve bodies are pressure rated 600 psi or 1,384 feet of
static water column pressure. This does not mean that a valve can be set at a well depth of 1,384 feet. To elevate and reduce the
hydraulic shocks in the riser pipe it is recommended that a check valve be installed every 200 feet in the riser pipe. See
Recommend Check Valve Installation chart below.

C. Prior to installing check valve: Make sure that the check valve is free from defects and that the valve’s spring-loaded poppet

mechanism is operating freely. Remove any foreign material (IE. PIPE DOPE) from valve seat.
D. Install check valve vertically with arrow pointed up in direction of liquid flow.
E. In submersible pump applications, the first check valve should be installed directly on the discharge head of the pump or

maximum one pipe length (20 feet) above pump.
F. If the pump has a built-in che ck valve, the second check valve should be installed no more than 25 feet above the lowest

pumping level in the well

Submersible pump

setting in well

200 feet or less One check valve on pump discharge and one on

200 feet to 600 feet One check valve on pump discharge and additional

600 feet to 800 feet

For deeper settings
contact factory

Water Hammer

Water pumped and flowing through a piping system has a certain amount of energy (weight x velocity). If the pumping is stopped, the
water continues to move and its remaining energy must be absorbed in some way. This absorption of energy can sometimes create
undesirable noise and/or damage. This is called water hammer.

Water hammer can destroy piping systems, valves and related equipment. Water hammer varies in intensity dependin g on the
velocity with which the water is traveling when the pump shuts down. It is very important for the installer to realize water hammer
potential, and he must take this into consideration when sizing the system and deciding what material the valves should be made
from.

It has been proven that for every foot per second of velocity 54 psi of backpressure is created. This means, in a 1” pipe, a flow of only
10 gpm could create a back pressure of 370 psi or more when the pump shuts down and the water column reverses. In a 4” pipe, a
flow of 350 gpm could create a backpressure of 860 psi. This does not take in consideration the weight of the water column in the
well. Flomatic valves are designed to help lessen the sometimes-damaging effects of water hammer on piping and related
equipment.

Recommended Check Valve Installation: Type Check Valve

Series 80E, 80SS, 80S6, 80DI ,

surface of well.

check valves installed at maximum 200ft intervals and
one at the surface of well.
One check valve on pump discharge and additional
check valves installed at maximum 200ft intervals and
one at the surface of well.

80DI-VFD, 80MDI, 80DIX,,
100E, 100MP, 100SS
Series 80E, 80SS, 80S6, 80DI ,
80DI-VFD, 80MDI, 80DIX, 100E,
100MP, 100SS
Series 80SS, 80S6, 80DI , 80DI­VFD, 80MDI, 80DIX, 100E,
100SS

Flomatic Corporation

Flomatic Valves, 15 Pruyn’s Island, Glens Falls, New York 12801

Phone: [phone] Fax: [phone] www.flomatic.com

VFD

Rev. B

Submersible Pump Check Valves Installation Instructions

Models 80DI-VFD 2” thru 12”

IMPORTANT CHECK VALVE INSTALLATION INSTRUCTIONS

(Fig. 1)

CHECK VALVE
AT SURFACE

TO PLUMBING SYSTEM

RISER PIPE

If the installation instructions are not followed

OR if valve is disassembled, warranty or any

warranty claims will be void.

NOTE: On initial system start-up, gradual

priming of vertical water column is

recommended to avoid valve damage due to

water shock.

WELL CASING

SUBMERSIBLE

PUMP

WARNING: DISASSEMBLING VALVE COULD

RESULT IN INJURY AND WILL VOID WARRANTY

OR ANY WARRANTY CLAMS

Rubber Disc

Stainless Steel
Stem

Check Valve
Body

Valve Poppet

Stem Cap

Patent Pending Valve Product

PLEASE CONTACT FLOMATIC FOR ANY FURTHER INFORMATION

Limited One Year Warranty: Flomatic valves are guaranteed against defects of material and workm anship 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 Valves, 15 Pruyn’s Island, Glens Falls, New York 12801

Phone: [phone] Fax: [phone] www.flomatic.com

Flomatic Corporation

200 FT MAX
BETWEEN
VALVES

LOWEST CHECK VALVE
25 FT MAX ABOVE
PUMPING LEVEL

CHECK VALVE MOUNTED
DIRECTLY ON PUMP

Retaining Ring

Poppet Guide

Sleeve Bearing

VFD

Rev. B