Page 1
Type-21 Ball Valves
1.0 SCOPE:
All requirements are for PVC, CPVC, PP & PVDF Type-21 Ball Valves and accessories.
2.0 MATERIALS:
U-PVC – Conforming to ASTM D1784 Cell Classification 12454 A
CPVC – Conforming to ASTM D1784 Cell Classification 23567 A
Polypropylene – Conforming to ASTM D4101 Cell Classification PP0210B67272
PVDF – Conforming to ASTM D3222-91A Cell Classification Type II
FKM – Viton® Fluorocarbon Rubber
EPDM – Ethylene Propylene Diene Terpolymer Rubber
PTFE – Teflon® Polytetrafluoroethylene
3.0 Type-21 Ball Valves:
All Type-21 ball valves sized ½” – 6”shall be of True-Union design with 2-way blocking capability.
PTFE seats shall have elastomeric backing cushions to provide smooth even stem torque and to
compensate for wear. Valves shall feature molded ISO mounting top flange for actuation
installation and Panel Mount feature on bottom of valve for securing in-line. The handle shall
double as the spanner wrench for maintenance and carrier adjustment.
3.1 Operators:
Type-21 1/2” – 6” (Lever Type standard)
Lever Handle to be Asahi Standard valve handle Red color.
3.2 Approved Manufacturer
Type-21 Ball Valves shall be provided by Asahi/America, Inc. of Malden, MA with no approved
equals. Manufacturer must be ISO-9001 certified.
3.3 Working Temperature:
Valves shall have a pressure rating of: 230 psi at 70
PVC, CPVC, PVDF (Soc, Thd or Butt)
150 psi at 70
& PVDF
150 psi at 70
0
F sizes 1/2” – 3”
0
F sizes 1/2” – 6” PP, 4 – 6” PVC, CPVC,
0
F sizes 1/2” – 6”
PVC, CPVC, PP & PVDF (Flanged)
4.0 Accessories:
4.1 Stem Extensions
Stem extensions where required should be designed, built and provided by the Asahi/America,
Inc., and be 1 of 3 styles:
Style BV-A Two piece extension with outer housing 100% sealed either free standing or
supported design.
Style BV-B Single piece extension either free standing or supported design
Style BV-P Single piece Panel Mount Extension made of PVC
Minimum Length = 4”
Maximum Length = 12”
Not Available for 4” or 6” Valves
4.2 Actuation
Actuation where required should be designed, built and provided by Asahi/America, Inc., and be
either pneumatic (Series 79P) or electric (Series 83, 94, or 92) type. All actuation accessories to
be provided and installed by Asahi/America, Inc. in accordance with manufacturers requirements.
Asahi/America, Inc., 35 Green Street, Malden MA 02148
Phone (781) 321-5409 Fax (781) 321-4421
www.asahi-america.com
Page 2
4.3 Locking Devices
Where required locking devices can be installed over the valve handle to prevent unauthorized
operation of the valve.
4.4 Operating Nuts
Where required 2” square operating nuts can be installed in place of valve handle.
Materials of construction – Annodized Aluminum.
5.0 Certifications:
5.1 NSF-61
PVC/EPDM and PVC/FKM models shall have NSF-61 Certification for use in drinking water
applications.
6.0 INSTALLATION PROCEDURES:
All valve joints shall be prepared using the preferred joining method for the valve material and
installation type in accordance with all requirements put forth in the Type-21 Operation &
Maintenance manual. All accessories should be installed in accordance with the manufacturers
requirements as well as any facility requirements.
Asahi/America, Inc., 35 Green Street, Malden MA 02148
Phone (781) 321-5409 Fax (781) 321-4421
www.asahi-america.com
Loading...