APTech AK M86 User Manual
Series AK M80/86
Crossover Manifold
INSTALLATION AND OPERATION
MANUAL
Part Number 00-15000010
Revision 3
Copyright © July 2006
Advanced Pressure Technology (“AP Tech”)
687 Technology Way
Napa, CA 94558
Phone: (707) 259-0102
FAX: (707) 259-0117
AK M80/86 Manual P/N 00-15000010 Rev 3
TABLE OF CONTENTS
1. DESCRIPTION.....................................................................................................................................3
2. SAFETY ...............................................................................................................................................4
2.1. General Safety Information.......................................................................................................4
2.2. AK M80/86 Crossover Manifold Specific Safety Information.................................................4
3. TECHNICAL SPECIFICATIONS .......................................................................................................5
3.1. AK M80/86 Specifications........................................................................................................5
3.2. AK M80/86 Facility Requirements...........................................................................................5
4. INSTALLATION .................................................................................................................................6
4.1. General......................................................................................................................................6
4.2. AK M80/86 Installation............................................................................................................6
4.3. Connect Gas Lines to AK M80/86............................................................................................7
4.4. Relief Valve Installation ...........................................................................................................8
4.5. Purge and Vent Equipment.......................................................................................................9
4.6. Initial Leak Test........................................................................................................................9
5. OPERATION......................................................................................................................................10
5.1. AK M80/86 Operation............................................................................................................10
6. TROUBLESHOOTING......................................................................................................................13
6.1. External leak ...........................................................................................................................13
6.2. Relief valve is opening and venting gas..................................................................................13
6.3. High delivery line pressure.....................................................................................................13
6.4. Low delivery line outlet pressure............................................................................................14
6.5. Both cylinders empty simultaneously.....................................................................................14
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AK M80/86 Manual P/N 00-15000010 Rev 3
1. DESCRIPTION
This installation and operation manual covers the series AK M80/86 crossover manifold. The AK M80/86
crossover manifold is used to maintain a continuous supply of source gas when the “in use” gas cylinder
is depleted by automatically drawing gas from a standby cylinder. The AK M80/86 consists of a
crossover regulator and a line regulator mounted to a common panel. The crossover regulator consists of
two regulators with separate inlets and a common outlet, machined into a single body. Two pressure
gauges are installed in the crossover regulator to indicate the inlet pressure from the A Side and B Side gas
cylinders. The crossover regulator supplies the line regulator. The crossover regulator has a plugged outlet
port at the 6:00 o’clock position for installation of a relief valve. A relief valve is recommended to protect
the low pressure side of the crossover regulator from full cylinder pressure in the event of a seat failure.
The line regulator has one primary outlet port, a secondary plugged outlet port, and a pressure gauge that
indicates outlet pressure. Custom configurations may vary slightly from this standard design.
shows the basic design.
Figure 1
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Figure 1. AK M80/86 Crossover Manifold Front View
Page 3 of 14
AK M80/86 Manual P/N 00-15000010 Rev 3
2. SAFETY
The user is strongly recommended to carefully read this section covering general safety information
and to adhere to specific safety information located throughout this manual.
2.1. General Safety Information
All technicians that install, operate, or maintain this equipment should be trained in the use and hazards of
compressed gases. Technicians should also be familiar with the hazards associated with the particular gas
being delivered. These hazards can include high pressure, asphyxiation, toxicity, flammability,
corrosivity, etc. Material safety data sheets are available from gas suppliers that provide detailed
information on the hazards associated with a particular gas.
Appropriate personnel protective equipment should be worn at all times as recommended by the material
safety data sheet for the particular gas and as required by safety practices at the installation site. This
equipment may include safety glasses, safety shield, rubber gloves, aprons, etc.
Never exceed the maximum working pressure of the equipment.
Equipment shall be installed in a manner that meets local, state, and federal regulations and safety
guidelines. General guidelines for compressed gases can be obtained from the Compressed Gas
Association (
Prior to disassembling manifold lines, the system may need to be purged using nitrogen or another gas to
remove any hazardous gases. The AK M80/86 system does not have built-in purging capability, which is
the responsibility of the user.
http://www.cganet.com/) and the European Industrial Gases Association (www.eiga.org).
2.2. AK M80/86 Crossover Manifold Specific Safety Information
An overpressure relief device should be installed in the plugged low-pressure (6:00 o’clock) port of the
crossover regulator. The outlet of the relief device should be connected to a scrubber system or directed
away from personnel as appropriate.
The AK M80/86 manifold should be checked for leaks upon installation and inspected periodically during
use.
A shut off valve and check valve should be installed between the both supply cylinders and the AK
M80/86 manifold inlet connections to prevent gas from the cylinder in use from escaping when a cylinder
is being replaced.
Installation of purge and vent valves are recommended when used with hazardous gases and exposure to
the gas can result in a safety hazard to personnel. Purge equipment is the responsibility of the user.
Page 4 of 14
AK M80/86 Manual P/N 00-15000010 Rev 3
3. TECHNICAL SPECIFICATIONS
3.1. AK M80/86 Specifications
3.1.1. Physical
Dimensions are approximately 6 inch wide by 10 inch high by 8-1/2 inch deep
Weight is approximately 9 lbs.
Mounting is by 4 each 1/4 inch diameter screws
3.1.2. Pressure and Flow
3500 psig maximum inlet pressure
250, 150, 100, 60, or 30 psig maximum outlet pressure options (specified when ordered)
75 slm nitrogen maximum flow at 200 psig minimum inlet pressure (depending on line regulator
outlet pressure setting)
3.2. AK M80/86 Facility Requirements
The following is needed to install the AK M80/86 manifold at the users facility.
Horizontal strut channel or wall with anchor bolts
1/4 inch diameter, hex head type screws (1/4-20 or 1/4-28 thread acceptable)
The following is required for proper operation of the equipment:
Check valve for installation between cylinder and regulator inlet port
Manual valve for installation between cylinder and check valve
Appropriate purge and vent system for hazardous gases
Relief valve for installation on crossover regulator low pressure port
Relief valve for installation on line regulator low pressure port
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