6SC SERIES
MODELS
910F, 910FLW, 920F
IRON SWING CHECK VALVE
INSTALLATION
OPERATION
MAINTENANCE
GUIDE
DOCUMENT NO.: ES-1495
REVISION LEVEL: B
ISSUED BY: Grant Fulghum DATE: 07/26/18
APPROVED BY: _________________ DATE: _______
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 2 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
INTRODUCTION ......................................................................... 3
Table 1. Apollo Series & Model Numbers ................................................................... 3
Table 2. Apollo Pipe Size (x) Designations .................................................................. 3
Table 3. Apollo Seat Trim Material (x) Designations………….……….………………………..3
Table 4. Apollo Swing Check Valve Material Designation ........................................... 4
Pressure/Temperature Ratings ................................................................................. 4
Product Marking ...................................................................................................... 4
INSTALLATION ........................................................................... 5
Installation Instructions ........................................................................................... 5
Figure 2. Apollo Iron Swing Check Valve with Lever and Weight…………………………….5
Table 5. Iron Flange – Class 125 stud sizes ............................................................... 6
Table 6. Iron Flange – Class 250 stud sizes ............................................................... 6
Figure 3. Bolt Tightening Sequence ........................................................................... 6
OPERATION ............................................................................... 7
MAINTENANCE .......................................................................... 7
Table 7. Bonnet Bolt Torque ..................................................................................... 7
AMENDMENT REGISTER ............................................................. 8
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 3 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
6SC-10x-x1
Size Code
Trim Style
INTRODUCTION
The APOLLO® Iron Swing Check valves covered in these guidelines are bolted bonnet,
horizontal swing valve types. They are used to permit flow in one direction only and close
when flow reverses. The disc, and any associated moving parts, may be in a constant
state of movement if the velocity pressure is not sufficient to hold the disc in a stable
position. Premature wear and noisy operation or vibration can be avoided by selecting the
size of the check valve on the basis of flow conditions, rather than selecting the check
valve according to the size of the pipeline.
Each valve is classified by its pressure rating. All valves designated as Class 125 and 250
comply with MSS SP-71 Standard Practice.
Table 1. APOLLO® Series & Model Numbers
SERIES
MODEL
DESCRIPTION
6SC-10x-x1
910F
Class 125 Flanged Iron Swing Check
6SC-20x-x1
920F
Class 250 Flanged Iron Swing Check
6SC-10x-x1L
910FLW
Class 125 Flanged Iron Swing Check with Lever and Weight
Table 2. APOLLO® Pipe Size (x) Designations
Pipe
Size
Apollo
code
Pipe
Size
Apollo
code
Pipe
Size
Apollo
code
Pipe
Size
Apollo
code
2”
8 5”
B 12”
H 20”
N
2-1/2”
9 6”
C 14”
J 24” P 3”
0 8”
E 16”
K 4”
A 10”
G 18”
M
Table 3. APOLLO® Seat Trim Material (x) Designations
Seat Trim
Apollo code
Available Sizes
Bronze
B
2"- 6"
Iron
0
8"- 20"
Example:
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 4 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
DATEPSIG(IN)
SIZE MAX MFG
3 200 0413 6SC100B1
910F
MODEL
MADE IN CHINA
Table 4. APOLLO Iron Swing Check Valve Material Designation
PART
MATERIAL
BOLTS
STEEL (ASTM A307 B)
NAMEPLATE
ALUMINUM
BONNET
CAST IRON (ASTM A126 CL B)
BODY GASKET
GRAPHITE
NUTS
STEEL (ASTM A307 B)
SIDE PLUG
BRASS (ASTM B16)
GASKET
GRAPHITE
HANGER PIN
BRASS (ASTM B16)
HANGER
DUCTILE IRON (ASTM A536 65-45-12)
DISC RING
CAST BRONZE (2"-6")-CAST IRON (8"-20")
DISC
CAST IRON (ASTM A126 CL B)
WASHER
STEEL (ASTM A307 B)
SPLIT PIN
STAINLESS STEEL (ASTM 420 S42000)
SEAT RING
CAST BRONZE (2"-6")-CAST IRON (8"-20")
BODY
CAST IRON (ASTM A126 CL B)
DISC NUT
STEEL (ASTM A307 B)
STUD BOLT
STEEL (ASTM A307 B)
Pressure/Temperature Ratings
Class 125
Saturated Steam: 125 psi (8.6 Bar) to 353°F(178°C) (2”-12”)
100 psi (6.9 Bar) to 338°F(170°C) (14”-24”)
Cold Working Pressure: 200 psi (13.8 Bar) at 100°F (2”-12”)
150 psi (10.3 Bar) at 100°F (14”-24”)
CLASS 250
Saturated Steam: 250 psi (17.2 Bar) to 406°F(207°C)
Cold Working Pressure: 500 psi (34.5 Bar) at 100°F
Product Marking
All APOLLO Swing Check Valves are equipped with a nameplate attached to the valve
(Figure 1). This plate provides the model number, part number, size, max pressure
rating, and date of manufacture.
FIGURE 1. APOLLO
IRON SWING CHECK VALVE NAMEPLATE
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 5 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
I
N
L
E
T
INLET
Lever and Weight position
for Horizontal installation
Lever and Weight position
for Vertical installation
INSTALLATION
APOLLO Swing Check Valves are designed for use between the faces of ANSI 125 and
250 pound flat flanges. Raised faced flanges are not recommended.
Valves may be installed in horizontal or vertical pipe lines. For horizontal service, the
valves inlet and outlet should be installed on the same level. The bonnet cap should be
positioned upward to allow disc and hanger mechanism to operate properly. The arrow on
the body must be pointing in the direction of intended flow. For vertical service, install the
check valve with the flow arrow pointing upward.
Installation Instructions
Step 1. Check to make sure that the pipe flange and valve sealing faces are clean and
free from any debris (pipe scale, welding slag, etc.).
Step 2. Check the valve nameplate to ensure that the pressure and valve materials are
correct for the application.
WARNING! – APOLLO® Swing Check Valves should never be installed where
service conditions could exceed the valve ratings. Failure to heed warning
may result in personal injury or property damage.
Step 3. Place the valve between the two flanges of the pipe and put the seal gasket
between the valve flange and the pipe flange; make sure that it is correctly
positioned. See Figure 2 for correct positioning of Lever and Weight option.
WARNING! – Upstream flow disturbances which create turbulence may also
result in rapid wear. It is recommended that a minimum of 10 pipe
diameters of straight pipe be provided between the check valve and any
upstream devices such as pumps, control valves or elbows etc.
Step 4. Assemble the valve to the pipe using properly sized bolts for application. See
Tables 5 and 6 below. Progressively tighten to the torque value recommended by
the seal gasket provider. See Figure 3 for recommended method.
After the valve installation on the line and before the line pressurization, the following
activities must be performed:
- the packing bolts must be verified for tightness, DO NOT OVERTIGHTEN.
- the torque of the body-bonnet bolts must be verified for tightness
- the valve must be fully stroke operated
FIGURE 2. APOLLO
IRON SWING CHECK VALVE WITH LEVER AND WEIGHT
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 6 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
Table 5. Stud/Bolt Iron Flange – Class 125
Valve
Size
Diameter
Length
Qty
(in)
(mm)
2 50
5/8”
3-1/2”
4
2.5
65
5/8”
3-3/4”
4 3 80
5/8”
3-3/4”
4 4 100
5/8”
3-3/4”
8 5 125
3/4”
4” 8 6
150
3/4”
4-1/4”
8 8 200
3/4”
4-1/2”
8
10
250
7/8”
4-3/4”
12
12
300
7/8”
5”
12
14
350
1”
5-1/2”
12
16
400
1”
5-1/2”
16
18
450
1-1/8”
16
20
500
1-1/8”
20
24
600
1-1/4”
20
Table 6. Stud/Bolt Iron Flange – Class 250
Valve
Size
Diameter
Length
Qty
(in)
(mm)
2 50
5/8”
3-3/4”
8
2.5
65
5/8”
4-1/4”
8 3 80
5/8”
4-1/2”
8 4 100
5/8”
4-3/4”
8 5 125
5/8”
5” 8 6
150
5/8”
5”
12 8 200
7/8”
5-3/4”
12
10
250
1”
6-1/2”
16
12
300
1-1/8”
7”
16
14
350
1-1/8”
7-1/4”
20
16
400
1-1/4”
7-3/4”
20
18
450
1-1/4”
8”
24
20
500 24
600
1 5 1 5
1 3 12 9
8 3
8 3
4 2 4 7
4 7
6 2
10 11
6 2
1 19
1 13 16 5
15 5
12 9
8 9
8 13
12 3
18 3
4 11
4 17
10 7
14 7
6 16
14 2 10 11
6 15
20 2
FIGURE 3. Bolt Tightening Sequence
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 7 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
OPERATION
APOLLO® Iron Swing Check valves function by allowing flow forces to move the disc from
the closed position to the fully open position in a sweeping arc motion against a hingestop inside the valve body. Due to the weight and center-of-gravity location of the disc
and swing arm assembly, the valve will return to the closed position should flow become
interrupted or reversed. Swing check valves produce the lowest pressure drop when
compared with other check valves of the same size.
MAINTENANCE
APOLLO® Iron Swing Check valves are designed for extended service with minimal wear
and servicing. Replacement parts are not available.
WARNING! – The pipeline on either side of the valve MUST be depressurized and
drained prior to repair.
Valve Seat
Leakage through the valve is generally caused by foreign matter lodged in the seat seal.
This leakage can be overcome by cycling the valve or flushing. If leakage persists,
disassemble the valve and examine the sealing surface on the body. If excessive damage
is done to sealing area, the valve may need to be reconditioned or replaced.
Bonnet Joint
Leakage through the bonnet joint may be corrected by tightening bonnet bolts. Reference
Table 7 below for recommended torque values depending on bolt size. See Figure 3 for
recommended tightening sequence. If tightening does not correct leakage, replacement of
graphite gasket will be required.
Table 7. Bonnet Bolt Torque
Bolt size
5/8”
3/4”
7/8”
1”
1-1/8”
1-1/4”
1-3/8”
Torque (Ft. Lbs.)
90
150
200
300
475
660
885
APOLLO® IRON SWING CHECK VALVE IOM GUIDE Page 8 of 8
ES1495 IOM Iron Swing Check Valve 1418 S. Pearl Street Pageland SC USA 29728
AMENDMENT REGISTER
DATE
ECN
REV
SECTION
PAGE
DESCRIPTION
9/25/2013
- A All
All
Released new standard
7/26/2018
M17040
B
Installation & Operation
5
Added Step 3 Warning
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