Issued: 4/13
Supersedes:
6/96
Flygt Ball Check Valves
The basic purpose of a check valve is to permit flow in
one direction, prevent flow in the opposite direction and
perform this function automatically and with minimum
maintenance. In pumping applications, the head loss
(pressure drop) across valves is also an important factor
to be considered.
The Flygt ball check valve meets all these requirements
by providing a positive back flow prevention, minimum
maintenance and low friction losses. Flygt ball check
valves offer great operational reliability because of their
construction and working principle. Its construction
consists of just three components: body, cover and ball,
the check ball is the only moving part.
The underlying principle of the ball check valve is just
as simple as it is effective. The valve housing has three
openings: one for the inflow of fluids, one for the outflow
of fluid and another for positioning the ball inside the
valve housing which is closed off by a bolted cover.
Normally, the rubber-coated ball closes off the inflow
opening. The ball is released from its seating when the
slightest difference in pressure occurs. As soon as the
fluid flows through the valve, the ball slides away from
the flow of fluid along both guide rails. The inlet is then
completely free. If the fluid pressure drops, the ball then
slides back into the valve seating again and closes off
the opening completely. This stops the backflow of fluid
and prevents any unnecessary damage to pumps.
The Flygt check valve keeps solids, stringy material, grit,
rags, etc. moving without the need for back flushing.
The ball rolls clear of the water way providing “full flow”
equal to the nominal size. There is no place for stringy
material to wrap around; no pockets for sediment to
collect; it is basically a non-clog check valve. There are
no outside levers, weights, springs, dash pots or other
accessories needed to correct the deficiencies of the
swing (clapper) check valve.
The ball is hollow metal with an exterior coating of nitrile
rubber, which is resistant to grease, petroleum products,
animal and vegetable fats, dilute concentrations of acids
and alkalies (PH 4 - 10), tearing and abrasion; has a
high load bearing capability and low compression set.
The ball rotates and thus seats on a different portion of
its surface each time. These features prevent excessive
wear and deterioration, therefore, assures a long useful
life without costly maintenance and down time.
Since the ball is only slightly heavier than water, the
energy needed to move the ball to full open position is
small compared to that necessary to lift a clapper, lever,
weight (or spring) plus bearing and packing friction of a
swing check valve. Net result is less head loss (pressure
drop) through a Flygt check valve.
The following advantages make Flygt ball check valves
extremely suitable for use in sewage and storm water
systems:
• Reliable operation without the danger of clogging.
• Efficient operation even with small pressure differences.
• No wear under normal conditions.
• Maintenance-free and long life.
Standard sizes are rated for:
• Working pressures of up to 145 psi (10 bar).
• Working temperatures of up to 176°F (80°C).
Special version for higher pressures and temperatures
available on request. When necessary, valves can be
supplied to meet special requirements such as materials,
coatings, special balls, etc.
If valve installation in the collection basin (wet well) is
not permissible, it can be directly buried in the ground
- no vault necessary.
Normal
Flow
Back
Flow
Prevention
Issued: 4/13
Supersedes:
1/06
Flygt Ball Check Valves
Typical installations with an Flygt submersible pump.
When the Flygt non-return valve is used
in conjunction with a Flygt submersible
pump, the resulting pump/valve system
provides a degree of dependability that
is second to none. Illustrated here are
only some of the possible installation
combinations.
It is very important to install a ball check
valve properly and following these few
minor checks will insure a trouble free
system operation:
1. Make sure that the valve is sized in
the correct way. Rule of thumb: Valve size
should be the same as the pipeline size. If
size of the valve is bigger or smaller there
must be a specific reason, check with the
design engineers.
PUMP ON
PUMP OFF - no backflow
2. Pressure rating of the valve should be
the same as that of the system.
3. Before installing the valve, perform a
visual inspection for defects of body, cover
or ball.
4. Check the movement of the ball. The
ball should move freely through the valve
housing.
5. Install the check valve with the arrow
pointing in the flow direction. (away from
the discharge side of the pump).
Floating Ball
Sinking Ball
Operates in any position.
The Flygt check valve
comes equipped with
either a sinking or floating
ball. The unit can operate
clog-free in any of the
positions shown by using
the appropriate ball. Up to
30o angularity from these
positions is permissible.
6. In cases of horizontal application
minimum required head behind the valve
is 10 ft. If 10 ft. is not available, please
contact Flygt.
7. In cases of vertical application there
are no head requirements.
Note: To meet conditions of low static
head, balls of various specific gravity
can be obtained. Consult nearest Flygt
products applications engineer when
static head on valve is less than 10 feet.
Issued: 4/13
Supersedes:
1/13
Flygt Ball Check Valves
Specifications
Ball check valves shall be designed to be non-clog,
fully automatic, maintenance free and specifically
suited for operation in sewage and storm water
where solids, fibers, grit or highly viscous materials
are encountered.
Ball check valves will have one moving part, the ball,
which automatically rolls out of the path of flow, thus
providing an unobstructed and "full flow" equal to
nominal size. Upon discontinuation of flow the ball
automatically rolls back to the closed position, thus
providing a positive seal against back pressure or
backflow.
The ball shall have an exterior coating of vulcanized
nitrile rubber resistant to grease, petroleum products,
animal and vegetable fats, dilute concentrations of
acids and alkalies, tearing and abrasion. The body
and cover shall be nodular cast iron type GGG 40/ASTM
65-45-12/SAE 4512.Ball check valves are designed to
be maintenance-free and suited for installation in the
horizontal or vertical position. The valve shall be so
constructed that by unbolting and lifting off the cover,
the ball may be removed and replaced without removing
the valve from the line.
Ball check valves will be available with either a floating
or sinking ball.
The valve shall be equal in all respects to model 5087
as supplied by Flygt.
Issued: 4/13
Supersedes:
8/03
Flygt Ball Check Valves
Type 5087
All dimensions (inches)
D
H
C
A
Nominal
Size
Part
Number
A
C
D
H
*2"
*2-1/2"
3"
4"
6"
8"
10"
12"
14"
16"
20"
24"
839170
839171
839172
839173
839174
839175
839176
839177
839178
14-450003
14-450030
14-450031
6.0
7.1
7.5
9.0
11.0
13.5
16.0
19.0
21.0
23.5
27.5
32.0
2.5
3.1
3.8
4.9
7.1
9.8
12.6
14.6
17.3
19.7
24.4
29.5
4.0
4.5
5.5
6.7
9.1
12.4
15.6
18.1
21.5
24.0
29.7
35.8
4.5
5.3
6.3
7.9
10.2
13.2
16.1
19.3
23.3
29.7
36.6
39.8
L
Weight
lbs.
8.0
20
8.5
25
9.5
29
11.5
44
14.0
92
19.4 163
24.5 320
27.5 440
31.0 683
36.0 937
43.3 1570
51.0 2646
Notes:
Flanges drilled to Class 125 Cast Iron Standard.
Dimensions for stainless steel valves may vary, consult Factory.
*Contact Flygt for 2" & 2-1/2" valve performance information.
L
Design Features:
Metal core with vulcanized Nitrile
rubber covering.
Sinking Type:
Specific Gravity
greater than 1.0
Floating Type: Specific Gravity
less than 1.0
145 psi max.
10"
12
14"
11
10
Flange Drilling: ANSI B16.1 Class 125 Flat Faced
Bolt holes straddle centerline.
Working Pressure: 12"
13
Body: Nodular Cast Iron -
Type GGG40/ASTM 65-45-12/SAE D4512
Ball:
Valve performance (with sinking ball)
Friction Loss
(ft) 14
8"
9
8
6"
4"
7
3"
6
5
4
3
2
1
0
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
x 1000 (GPM)
Working Temperature: 176°F max.
(212°F max. with optional EPDM-coated ball).
Application:
Generally used for sewage and storm water. For
other flowing media, various types of coatings and
ball elastomers are available. Details are required
for proper evaluation.
Friction Loss
45
(ft) 45
40
40
24"
20"
35
35
30
30
16"
25
25
20
20
15
15
10
10
55
0
0
00
10000
10
20000
20
30000
30
40000
40
x 1000 (GPM)
50000
50
60000
60
70000
70
80000
80
Issued: 4/13
Supersedes:
Flygt Ball Check Valves
Type 2002
CAP
SEALANT
BODY
BALL
H
C
NPT
NPT
L
All dimensions (inches)
NPT
Nominal
Size
3/4"
1"
1-1/4"
*1-1/2"
Part
Number
C
H
L
Weight
lbs.
14-450011
14-450012
14-450013
14-450014
1
1-1/4
1-5/8
2
2
2-5/8
3
3-5/8
4-3/8
5-3/8
6-1/4
7-5/8
1.4
2.4
3.8
6.1
* Also available in Stainless Steel - consult Factory -
Design Features:
Application:
Body: Bronze -- Female NPT Thread
Cap:
Bronze, Threaded
Compressed air and water systems, including
potable water. Any liquid or gas compatible with
bronze, nitrile rubber or stainless steel.
Sealant: Loctite® pipe sealant #572
Ball:
Metal core with vulcanized Nitrile
rubber covering.
Sinking Type:
Specific Gravity
greater than 1.0
Floating Type: Specific Gravity
less than 1.0
Working Pressure: 145 psi max.
Working Temperature:
176°F max.
Note: When the static head on the outlet
side of the check valve is less than 10' of
water or 4 psi, valve should be installed in
the vertical position only.
7/03