Cla-Val 582SWS User Manual

INSTALLATION / OPERATION / MAINTENANCE

SERIES

582

Two-Door Check Valves

2

5

4

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Figure 1 2” thru 12”

1

INTRODUCTION

The Cla-Val Series 582W, 582G Two Door
Check Valves are ruggedly constructed with
bronze doors and stainless steel trim for years
of trouble-free operation. The valve should be
installed in horizontal or vertical flow up pipes
carrying clean water. the valves have special
springs for operation in blower air service
(Series 582A).
Two door check valves are designed to open
allowing flow in the forward direction and close
rapidly upon flow reversal. The valves are used
to prevent reverse flow through pumps or pip­ing systems. The size, cold working pressure,
model number, and year of manufacture are
stamped on the nameplate for reference.
The valve is not intended for fluids containing
suspended solids such as wastewater or haz­ardous fluids.

RECEIVING AND STORAGE

Inspect valves upon receipt for damage in ship­ment.
When lifting, the valve, always lift by the body
and never lift by the bronze or stainless steel
trim. Lifting eyebolts are provided on NPS 10­12 (DN 250-300) valves.
The valves should remain boxed, clean and dry
until installed to prevent weather related dam­age. For storage greater than six months, the
rubber surfaces of the seat should be coated
with a thin film of FDA approved grease.

DESCRIPTION OF OPERATION

The Cla-Val Two Door Check Valves are
designed to prevent reverse flow automatically.
On pump start-up, the flow of water enters the
valve from the seat end (right sided Figure 1)
and forces the two door open until the strike the
disc stop pin. On pump shut-down, the torsion
spring closed the door before flow reversal
takes place.
The valve body is supplied with compact wafer
ends as shown in Figure 1 for installation
between mating flanges.
The only moving parts in the valve are the
doors and spring, which are guided in the body
with a hinge pin and a full open disc stop pin.
The pins are retained in the body by stabiliza-

2

5

4

1

Figure 1A 14” thru 60”

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tion spheres to prevent vibration. The valve has
a resilient seat for drop tight shut off.

INSTALLATION
CAUTION: The flow arrow on the valve body

must point in the direction of flow when the sys­tem is in operation. The valve can be installed
in horizontal lines with the disc hinge pin in the
vertical position, or in vertical lines with flow up.
Valves for air service (Series 582Arequire spe­cial springs to allow full valve opening.
Install valve between standard flanges that cor­respond to the dimensions given in ANSI B16.1
for 125# flanges or to those given in ISO 7005
for PN10 and PN16 flanges. (See Table 1)
Note: Integrally-cast locating wings around the
exterior, enable the valves to mount between
these different bolt patterns. (See Figure 2) The
number of wings are not provided because the
desired universal fit is accomplished without
them.
The gasket can be rubber or compressed fiber.
Ring gaskets are appropriate for this wafer style
check valve, but full-face flange gaskets may
be substituted. The studs or bolts used should
span the full length of the valve.
Three diameters of straight pipe upstream of
the valve are recommended to prevent turbu­lent flow through the valve, which can cause
vibration and wear.
When mating the check valve with butterfly iso­lation valves, the isolation valve must be
installed at least one diameter downstream of
the check valve because, in most sizes the
check valve discs extend beyond the down­stream flange face and may interfere with the
operation of adjacent valves. In these sizes, a
short run of pipe or spacer is needed between
the check valve and the isolation valve.

INSTALLATION PROCEDURE:

Lower valve between mating flanges. NPS10
(DN 250-300) valves are provided with a lifting
eyebolt to aid in this process. Lubricate the
flange bolts or studs and insert them around the
flange. lightly turn bolts or nuts in graduated
steps using the cross-over tightening method.
Recommended lubricated torques for use with
resilient gaskets are given in Table 1.

2

1

Figure 1B 2” thru 12”

Size Class Bolt Size Qty Bolt Torque

NPS 2 ANSI 125# 5/8 in. 4 25-75 ft-lb

DN 50 ISO 7005 PN16 M16 4 40-120 N-m

NPS 2.5 ANSI B16.1 125# 5/8 in. 4 25-75 ft-lb

DN 65 ISO 7005 PN16 M16 4 40-120 N-m

NPS 3 ANSI B16.1 125# 5/8 in. 8 25-75 ft-lb

DN 80 ISO 7005 PN16 M16 8 40-120 N-m

NPS 4 ANSI B16.1 125# 5/8 in. 8 25-75 ft-lb

DN 100 ISO 7005 PN16 M16 8 40-120 N-m

NPS 5 ANSI B16.1 125# 3/4 in. 8 40-120 ft-lb

DN 125 ISO 7005 PN16 M16 8 40-120 N-m

NPS 6 ANSI B16.1 125# 3/4 in. 8 40-120 ft-lb

DN 150 ISO 7005 PN16 M20 8 65-200 N-m

NPS 8 ANSI B16.1 125# 3/4 in. 8 50-150 ft-lb

DN 200 ISO 7005 PN10 M20 8 65-200 N-m

DN 200 ISO 7005 PN10 M20 12 65-200 N-m

NPS 10 ANSI B16.1 125# 7/8 in. 12 60-180 ft-lb

DN 250 ISO 7005 PN10 M20 12 65-200 N-m

DN 250 ISO 7005 PN16 M24 12 100-300 N-m

NPS 12 ANSI B16.1 125# 7/8 in. 12 65-200 ft-lb

DN 300 ISO 7005 PN10 M20 12 80-240 N-m

DN 300 ISO 7005 PN16 M24 12 125-375 N-m

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Table 1. Flange Bolt Torques

ANSI CLASS 125
BOLT CIRCLE

ISO BOLT CIRCLE

9

3

6

8

10

B DIA.

7

Figure 2 Integrally-Cast Locating Wings

Page 1

VALVE MATERIALS OF CONSTRUCTION

7

6

3

B DIA.

9

8

10

ANSI CLASS 125

BOLT CIRCLE

ISO BOLT CIRCLE

8

9

ANSI CLASS 125

BOLT CIRCLE

7

3A

3B

4B

6A

6B

10

7

6

3

9

8

10

2

4

1

5

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2

5

4

1

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1

2

5

4

SERIES 582W and 582G

Sizes 2’ thru 12” Body (1) is Ductile Iron - Doors (2) are Bronze - the Torsion Spring (3) and Balance of Metal Parts
are Type 316 Stainless Steel, Seat is Buna-N®.

SERIES 582

Sizes 14” thru 60” - Body (1) are cast Iron, Doors (2) are Bronze - Torsion Spring (3) and balance of material parts

®

are Type 316 Stainless Steel, Seat is Buna-N

.

Note: Series 582W are Wafer Style, with plain ends 2” thru 12”. No flange bolt holes.

Series 582 are also Wafer Style 14” - 60”, but some sizes are supplied with threaded flange holes..
For materials and Details of construction see Fig. 3, Fig 4, Fig. 5, Tables 3A, 4A, 5A.
SERIES 582W and 582 are Wafer Style to fit between two pipe flanges. SERIES 582G has Grooved End Body.

®

All have Buna-N

Seats; bonded to the bodies; not adjustable or field replaceable.

Warning: For valve inspection, do not disconnect mating flanges without first draining the pipeline.

Series 582W

Fig. 3 Two Door Check Valve

Item Description Material

1 Body Ductile Iron w/ Buna-N
2 Disc Bronze
3 Spring* T316 Stainless Steel
4 Hinge Pin T316 Stainless Steel
5 Stop Pin T316 Stainless Steel
6 Bearing* T316 Stainless Steel
7 Hinge Pin Ret.* T316 Stainless Steel
8 Stop Pin Ret.* T316 Stainless Steel
9 Stab. Sphere* Buna-N

10 Spacer* HDPE

*Recommended Spare Parts

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®

Seat

Series 582 (14” thru 60”) Series 582G (2” Thru 12”)

Fig. 5 Two Door Check Valve

Item Description Material

1 Body Cast Iron

w/ Buna-N®Seat

2 Disc Bronze

3A,3B Spring* T316 Stainless Steel

4A Hinge Pin T316 Stainless Steel
4B Shaft Collar T316 Stainless Steel

5 Stop Pin T316 Stainless Steel
6A Inner Bearing* T316 Stainless Steel
6B Outer Bearing* T316 Stainless Steel

7 Hinge Pin Ret.* T316 Stainless Steel

8 Stop Pin Ret.* T316 Stainless Steel

9 Stab. Sphere* Buna-N
10 O-Ring* Buna-N

®

®

Item Description Material

1 Body Cast Iron w/ Buna-N
2 Disc Bronze
3 Torsion Spring* T316 Stainless Steel
4 Hinge Pin T316 Stainless Steel
5 Stop Pin T316 Stainless Steel
6 Thrust Bearing* T316 Stainless Steel
7 Hinge Pin Ret.* T316 Stainless Steel
8 Stop Pin Ret.* T316 Stainless Steel
9 Stab. Sphere* Buna-N

10 Spacer* HDPE

*Recommended Spare Parts

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Seat

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MAINTENANCE

Two Door Check Valves require no scheduled lubrication or
maintenance.

INSPECTION:

Periodic inspection for leakage can be performed by listen­ing or leakage noise from the valve while the pump is shut
down. If leakage is heard, drain the pipeline, remove the
valve, and inspect the seating surfaces for wear of damage.
If the resilient seat is damaged, replace the valve or return
the valve to the factory for refurbishing.

TROUBLE SHOOTING

Several problems and solutions are presented below to
assist you in troubleshooting the valve assembly in an
efficient manner.

Valve Chatters or Vibrates:

Verify velocity is at least 4 ft/sec. (consult factory for air service). A
partially open valve will wear prematurely. Verify there are three
diameters of straight pipe upstream.

Valve Leakage:
Check upstream gasket and flange bolt torque for flange leakage.
Drain line, remove valve and inspect seating surfaces.

Valve Does Not Pass Flow:

Check flow arrow direction on valve body is correct. Verify down­stream isolation valve is open and there is no line blockage down­stream.

4. Lift doors (2) from body. Inspect pins and seating surfaces for
wear. The shaft diameter is normally about 1/16" (1.5mm) smaller in
diameter than the hole in the disc lugs. Some minor dents and dis­colorations are normal. Wear areas in the Buna-N
will cause leakage and require valve to be returned to Cla-Val facto­ry to be refurbished.

5. Inspect spring (3) for wear or cracks.

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resilient seat

REASSEMBLY:

All parts must be cleaned and gasket surfaces cleaned with a stiff
wire brush in the direction of the serration or machine marks. Worn
parts, gaskets and seals should be replaced during reassembly.

1. Lay body on flat surface with arrow facing upwards. Carefully
place the two doors with the machined sealing surfaces down on
the body sealing surface. Align the door lugs with the pin holes in
the body.

2. Insert the door hinge pin into the hole on one side of the body
but not through the door lugs. Install a spacer (10) between the
inside diameter of the body and the door lug. Push the door hinge
pin further to engage the first door lug.

3. Install a thrust bearing (6) between the first and second door
lugs and push the pin further to engage the second door lug.

4. While holding the torsion spring (3) with one of the ends facing
you, wind the rear tab 180 degrees in a clockwise direction and
then press the spring between the two sets of door lugs. Engage
the pin further to retain the spring and the third door lug. The legs
of the spring should apply a downward force on the door.

Valve Slams:

Remove valve and inspect spring. Heavier springs can be furnished
for severe high-head applications. Consult factory if the valve is
installed in a vertical pipe with the flow downstream.
Pump discharge lines may have trapped air.

DISASSEMBLY:

The valve must be removed from the pipeline for repair. All work on
the valve should be performed by a skilled mechanic with proper
tools. Refer to Figure 3, page 2.

WARNING:

The line must be drained before removing the valve or pressure
may be released causing injury.

1. remove the valve from the pipeline. NPS 10-12 (DN 250-300)
valves are provided with a lifting eyebolt to aid in this process. Lay
valve on flat surface or bench with the flow arrow facing upwards.

2. Remove the retainer set screws (7) & (8) and the rubber
spheres (9). The retainer set screws are metric and should be
removed, using standard metric hex drive bits or wrench.

3. Drive out the pins (4 & 5) with a round bar or punch while pressing
down on the spring (3) to prevent it from unwinding.

Warning: Valves 18" and larger have 2 springs and require
extreme care to prevent rapid uncoiling of the spring during disas­sembly. Restrain the spring with boards and clamps during disas­sembly.

Note: 18” and larger valves have two springs and require extreme
care to prevent rapid recoiling of the springs. Restrain the spring
during assembly with boards and clamps. See Fig. 4, page 2.

5. While pushing the pin further, install the third thrust bearing (6),
the fourth door lug and than the second spacer (10). The pin
should now be centered in the body and the door should
rotate without binding.

6. Insert the door stop pin (5) into the holes in the body.

7. Insert a stabilization sphere (9) into each of the four holes pin
holes. 48" and larger valves will have rubber washers instead of
spheres.

8. Place a small amount of pipe thread sealant such as Loctite
PST on the retainer pipe plugs (7 & 8) and tighten in place. 48" and
larger valves will have o-rings for two of the plugs instead of
tapered threads.

9. Stand the valve on its edge with pins vertical and verify smooth
operation of the valve before installation into the pipeline. Apply a
light coat of silicone grease on the rubber seat for air service valves
(Series 582A).

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CLA-VAL

© 2004 Cla-Val Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

Valve Construction (14” - 60”) The standard check valve body general details of construction are illustrated in Figure 6, 7, 8 tables

The body (1) is either wafer style to fit between two pipe flanges or lug style for bolting two pipes flanges. The resilient seat is bonded
to the body and not adjustable or replaceable in the field.
The doors (2) and Torsion spring (3) are the only moving parts and require no maintenance or lubrication

Warning: Removal of mating flanges with out draining the pipeline may cause injury or damage to the valve

ANSI CLASS
125, 150,
BOLT CIRCLE

2

3A

3B

4B

9

ANSI CLASS 125

BOLT CIRCLE

10

7

2

8

6

5

9

3

7

1

4

1

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8

6A

6B

5

4

Figure 6 Two Door Check Valve

Table 6A Check Valve Parts List

DETAIL DESCRIPTION

Body Cast Iron

1

Doors Bronze

2

3, 3A, 3B

4A
4B

6A
6B

10

Spring*
Hinge Pin Stainless Steel

4

Hinge Pin Stainless Steel
Shaft collar
Stop Pin Stainless Steel

5

Bearing* (qty. 4) Stainless Steel

6

Inner Bearing* Stainless Steel
Outer Bearing* Stainless Steel
Hinge Pin Retainer* Steel

7

Stop Pin Retainer* Steel

8

Stabilizer Spheres* Buna-N

9

O-Ring* Buna-N

*Recommended Spare Parts

(qty 2springs on 18” and larger) Stainless Steel

(item 4B on 36” and larger sizes only)Stainless Steel

10

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MATERIAL

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(18” & Larger)

Sizes 18” & Larger Utilizes (2) Springs

Figure 7 Two Door Check Valve

PARTS AND SERVICE:

Parts and service are available from your local
representative or the factory. Make note of the
Valve Size and Model No. located on the valve
nameplate.

Contact Your Local Cla-Val
Representative or Distributor

A sales representative will quote prices for
parts or arrange for service as needed

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N-582 Series