Amico Medical Gas Check Valve with Extensions User Manual

Installation lnstructions V1.1

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Medical Gas Check Valve

with Extensions

Caution

WARNING, CAUTION,

NOTE are of special significance. Please read these sections

WARNING: denotes steps which can prevent injury.

CAUTION: denotes steps which can prevent damage to equipment.

It is the installers and/or system designers responsibility to ensure that these valves
are installed in accordance with applicable and current NFPA/CSA Standards.

Maintenance

1. If a problem should arise, do not disassemble the valve while the line is under pressure.

2. Repair kits are available, should the check valve need replacing.

Operation

1. No manual operation is required, of the check valve, once it is in the pipe line.

NOTE: Not recommended for use with reciprocating pumps and similar applications which
may induce repetitious vibrations. Low ow rates, which do not fully open the valve, may
result in undesirable noise and premature valve failure. Upstream ow disturbances, which
create turbulence, may also result in rapid wear. Therefore it is recommended that a minimum
of 10 diameters of straight pipe be provided between the check valve and any upstream ow
disturbances such as pumps, control valves, elbows, etc.

2 Amico Pipeline

Valve Installation

1. Remove check valve from packaging and inspect for any shipping damage or loose fasteners.
All fasteners have been set with Loctite®. If damaged in shipping, save original box and box
contents.

2. If check valve is to be painted or insulated, record the valve data on the valve identication tag.

3. If valves are being stored, they should be in a weather-protected area, preferably indoors.

4. Open and close the discs of your valve a few times by hand to assure freedom of movement.

5. The ow arrow on your valve indicates the direction of ow upon installation.

6. Use only a strap type wrench for installation to prevent distortion of the valve body.

7. If this valve is installed in a horizontal line, make sure the screws protruding through the top
and bottom of the valve body are in the vertical position. Maintain at least 6 pipe diameters
of straight length of piping between the check valve and any other line restriction, i.e. elbows,
tees, valves, etc.

8. If the valve installation is in a vertical line with upward ow, the position of the wing support
is not important. There should be at least 6 pipe diameters of straight unrestricted piping
upstream and downstream of the check valve. If space conditions do not allow for this, the
valve must be installed so that the ow is equally distributed across the two valve discs

(see gure A).

9. Before brazing, make sure that all brazing surfaces are free of dirt, oil and grease. Apply and
wrap wet rags around the tube extensions next to the check valve. In addition to wet ragging,
Amico recommends to use a heat sink (such as cool blue oxygen compatible) during the
brazing process. Applying the heat sink will prevent possible damage to the check valve seal
and spring.

10. Connect copper tubing to the check valve extensions using brazing materials and methods in
accordance with NFPA 99 or CSA Standards.

11. Once the check valve extensions are cool, remove the rags.

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12. Test the system (per appropriate standards) to ensure that the intended gas service is
connected to the appropriate line.

13. Test the system for leaks (per appropriate standards).

14. If no leaks are found, gauges (purchased separately) can be installed, if required. Pipe
sealants should comply with requirements of NFPA 99 or CSA Z7396.1. Use care to exclude
pipe sealants from the check valve cavity and from interior tube surfaces exposed to medical
gas ow service. Properly applied Teon tape is an alternative to pipe sealants.

4 Amico Pipeline

Valve Repair Kit

Valve Repair Kit

SIZE PART NUMBER

½” V-X-CHK-RK-05

¾” V-X-CHK-RK-07

1” V-X-CHK-RK-10

1-1/4” V-X-CHK-RK-12

1-1/2” V-X-CHK-RK-15

2” V-X-CHK-RK-20

2-1/2” V-X-CHK-RK-25

3” V-X-CHK-RK-30

4” V-X-CHK-RK-40

ITEM DESCRIPTION QTY KIT

1 Flange And Tube Assy (Left)

2 Flange And Tube Assy (Right)

3 O-Ring Seal (Silicone) - High Temp 2 X

4 Check Valve Body and Internals 1 X

5 Sealing Washer

6 Bolt (Wing Support)

7 Flange Bolt

8 Plain Washer

9 Lock Washer

10 Flange Nut

11 End Cap

12 Wing Assy Limiter (4" Only)

13 Limiter Bolts (4" Only)

14 Limiter Sealing Washer (4" Only)

15 Hex Plug

X items included in the kits

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COMPLETE REPLACEMENT OF VALVE BODY:

1. Make sure when you order complete body replacement assemblies that the new assemblies
are identical to the original. Always reference your check valve’s part number when ordering
replacements.

2. Remove nuts and bolts using the correct size wrench (caution, using incorrect size wrench

may damage the bolts)

3. Carefully remove valve body and O-ring seals from anges.

4. Install new O-rings and valve body.

NOTE: Insure the arrow indicated on valve body follows gas ow.

5. Install nuts and bolts as shown in (Figure B).

6. Tighten nuts and bolts following the torque chart provided below.

VALVE SIZE BOLT SIZE kgf-cm In-lbs N-m

½” 5/16-18 x 2-3/4" 90 78 9

¾” 5/16-18 x 2-3/4" 90 78 9

1" 5/16-18 x 3" 90 78 9

1-1/4” 3/8-16 x 3-1/2" 120 104 12

1-1/2” 3/8-16 x 3-3/4" 120 104 12

2" 1/2-13 x 4-1/2" 120 104 12

2-1/2” 1/2-13 x 4-1/2" 120 104 12

3" 1/2-13 x 6" 120 104 12

4” 1/2-13 x 6-1/2" 120 104 12

Tighten Bolts in the numbered sequence listed below

6 Amico Pipeline

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Amico Pipeline | www.amico.com

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Ontario, L4B 2N4, Canada

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NY 11729, U.S.A

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APE_INSTAL_MAINT_GAS_CHECK_VALVE 09.17.2013