APTech AZ4571 User Manual
687 Technology Way
Napa, CA 94558
Phone: (707) 259-0102
FAX: (707) 259-0117
www.aptech-online.com
Operation Manual
Pneumatic Diaphragm Valves (normally closed)
Models AK/AP/AZ3000, AK/AP/AZ3004, AK/AP/AZ3007, AP3113, AP3130, AP3260,
AK/AP/AZ3540, AK/AP/AZ3542, AK/AP/AZ3545, AK/AP/AZ3550, AK/AP/AZ3571, AP3700,
AK/AP/AZ4540, AK/AP/AZ45 42, AK/AP/AZ4550, and AK/AP/AZ4571
A. General Information
AP Tech normally closed (NC) pneumatic diaphragm valves are used in gas delivery systems to
control gas flow. Many different models are available with different pressure ratings, flow
capacities, and porting configurations.
The AK/AP/AZ3571 and AK/AP/AZ4571 operate differently than other NC valves because the
valves have an additional actuation port that is used to partially open the valve to a “metered”
flow.
Refer to the appropriate catalog data sheet for specific product information.
B. System Design/Product Selection
1. When selecting the valve model and configuration, verify the following information.
a. Verify the materials of construction are compatible with the intended process gas.
b. Verify the pressure and temperature ratings are acceptable for the intended application.
c. Verify the actuation pressure supply is appropriate.
d. Verify that the flow capacity (C
) of the valve is appropriate for the application.
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2. Valves can be used under a large variety of operation conditions. The system designers shall
decide product selection based upon their own analysis and testing to verify acceptable
operation with specific equipment.
C. Installation
1. Verify the pressure rating is acceptable.
2. Inspect the valve to determine the flow path through the valve and how the valve will be
installed in the system.
a. An inlet (upstream) port is defined as a port connected to the region below the valve seat
and may be labeled with an “IN” marked into the body near the port.
b. An outlet (downstream) port is defined as a port connected to the region above the seat
and below the diaphragm. The outlet port is usually not labeled, but may be marked
“OUT”.
c. The traditional flow direction is inlet to outlet, but AP Tech valves may be employed in
either traditional flow direction or the reverse.
Manual 15000005 Rev 7 Page 1 of 4
Operation Manual Pneumatic Diaphragm Valves (NC)
d.
On Series DV Monoblock valves the port that is common with the block valves is marked
with a “C”. No other marking is shown. Refer to Technical Bulletin 205 for schematics of
the monoblock configurations and more detailed information.
3. Install the valve using the appropriate method described below.
a. For tube stub connections, weld connectors or other components to the tube stubs per
standard industry practice (reference SEMI standard F78).
b. For metal face seal connectors, assemble connections per standard practice described by
fitting supplier (typically 1/8 turn past finger-tight).
c. For compression-type connectors, insert the tube into the fitting until it stops. Tighten the
fitting by applying 1-1/4 turns of nut rotation.
i) For reinstallation, mark the nut and the valve body before disassembly. This will
allow the nut to be returned to the original assembly position. Insert the tube and
attached ferrules into the fitting until fully seated. Rotate the nut until it is returned to
the original assembly position, and tighten slightly beyond marked position.
d. Most valves can be attached to panels or mounting plates using the 10-32 or M5 female
thread mounting holes located in the bottom of the body (valves with M5 mounting holes
will be marked with a “5” on the bottom of the body). Special configurations or multivalve blocks may not have mounting holes or may have different size holes. Refer to the
specific data sheet or Technical Bulletin for detailed mounting information.
4. Connect a nitrogen or clean dry air actuation pressure supply to the valve actuation port
connection. The connection may be a 1/8 NPT female thread, 10-32 female thread, or
M5x0.8 female thread depending on the valve model.
a. The AK/AP/AZ3571 and AK/AP/AZ4571 have two actuation ports. The port marked “1”
is the metered flow actuation port and the port marked “2” is the full open actuation port.
5. After installation, perform a leak test of all connections and welds per standard industry
practice (reference SEMI standard F1).
Manual 15000005 Rev 7 Page 2 of 4
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