Valves
swtwater.com Aquamatic V42 Series
Cast Iron Diaphragm Valves
AquaMatic V42 Series Diaphragm Valves are constructed of cast iron or brass and designed for water applications. Their unique Y-pattern design with a large seat opening and high lift disc permits higher flow rates at lower pressure loss than competitive valves. This product is manufactured in the United States of foreign and domestic parts.
Aquamatic V42 Series Cast Iron Diaphragm Valve Flanged Aquamatic V42 Series Cast Iron Diaphragm Valve
 
Typical Applications
• Agricultural Irrigation
• Car Wash Systems
• Centrifugal Separators
• Cooling Towers
• Laundry Equipment
• Level Control Systems
• Hydraulic Machinery
• Nitrogen Handling
• Plastic Molding
• Process Water Systems
• Pump Controls
• Street Cleaning Vehicles
Features and Benefits
• Larger diaphragm area than seat area permits drip-tight closing without any springs
• All components can be serviced while the valve is inline
• Separate flow and control chambers permit positive closing without springs
• Reinforced diaphragms are pre-formed and stress relieved to maximize responsiveness and product life
• Diaphragm acts as an actuator, eliminating the need for electric or pneumatic actuators
• Cast iron, brass, stainless steel, and nitrile elastomer components for unparalleled service
• Available in 3/4 to 3 inch threaded (NPT or BSP) and 3 to 6 inch flange drilled in accordance with ASA 16.1 class 125, or BSP4504
• Adaptable to a wide variety of control devices
 
 
Certified by IAPMO R&T to NSF/ANSI 61 and NSF/ANSI 372 for lead free compliance.
Operating Specifications
Max Pressure: 125 psi (8.6 bar)
Max Temperature: 140°F (60°C)
NOTE: IAPMO R&T NSF/ANSI 61 and NSF/ANSI 372 certifications are limited to restrictions below. Other options were not tested for certification.
Cold water applications below 73°F (23°C).
Normally Open valves.
EPDM seal material (seal option #1).
Options
• Spring-assist closed
• Spring-assist open
• Limit stop for flow control
• Position indicator
• Seal and diaphragm materials for special applications
• High temperature service
 
 
 
Principles of Operation
Closed V42 Diaphragm Valve Drawing
DRIP-TIGHT CLOSING: Closure is obtained by directing line pressure or equivalent independent pressure into the upper chamber. This pressure on the large diaphragm area causes the valve disc to seal against the seat.
 
Open V42 Diaphragm Valve Drawing
FULL OPEN OPERATION: When the closing pressure in the upper chamber is relieved by venting the pilot line, the valve opens positively, by line pressure on the disc.
 
 
Dimensions and Weights
V42 Dimensions Drawing
 
Model
Number		 Pipe
Size
Inch
(mm)		 Cv
(Kv)		 End
Connector
Style		 Approximate Dimensions
Inch (mm)
A B C D E F
V42B 3/4
(20)		 11.4
(9.8)		 Threaded 3.69
(94)		 4.25
(108)		 3.75
(95)		 2.75
(70)		 — —
V42C 1
(25)		 12.8
(11.1)		 Threaded 3.69
(94)		 4.25
(108)		 3.75
(95)		 2.75
(70)		 — —
V42D 1-1/4
(32)		 26.5
(22.9)		 Threaded 4.75
(121)		 5.37
(137)		 4.00
(102)		 3.50
(89)		 — —
V42E 1-1/2
(40)		 32.5
(28.1)		 Threaded 4.75
(121)		 5.37
(137)		 4.00
(102)		 3.50
(89)		 — —
V42F 2
(50)		 56.0
(48.4)		 Threaded 6.62
(168)		 7.25
(184)		 5.37
(137)		 4.87
(124)		 — —
V42G 2
(50)		 68.0
(58.8)		 Threaded 7.37
(187)		 8.00
(203)		 5.75
(146)		 5.50
(140)		 — —
V42H 2-1/2
(65)		 84.0
(72.7)		 Threaded 7.37
(187)		 8.00
(203)		 5.75
(146)		 5.50
(140)		 — —
V42J 3
(80)		 134.0
(116.0)		 Threaded 9.00
(229)		 9.75
(248)		 6.75
(171)		 7.25
(184)		 — —
V42J 3
(80)		 134.0
(116.0)		 Flanged 10.62
(270)		 10.75
(273)		 7.00
(178)		 7.25
(184)		 6.00
(152)		 0.75
(19)
V42K 4
(100)		 275.0
(238.0)		 Flanged 11.75
(298)		 14.75
(375)		 10.00
(254)		 8.75
(222)		 7.50
(191)		 0.75
(19)
V42L 6
(150)		 680.0
(588.0)		 Flanged 17.00
(432)		 19.00
(483)		 13.50
(343)		 15.75
(402)		 9.50
(241)		 0.87
(22)
 
 
V42 Performance Curves
 
 
 
Safe Water Technologies, Inc.
996 Bluff City Boulevard
Elgin, IL 60120 USA
  
 
Telephone: +1.847.888.6900
Facsimile: +1.847.888.6924
E-mail: info@swtwater.com
https://www.swtwater.com

Last Updated: April 1, 2024