AquaMatic V42 Metal Diaphragm Valves
¾ – to 6-inch “Y” Pattern Diaphragm Valve Cast Iron or Cast Brass Body and Cap.
This product is manufactured in the United States of foreign and domestic parts.

Features & Benefits
- Large seat opening and high lift-disc for higher flow rates at a lower pressure loss
- Separate flow and control chambers permit positive closing without springs; and only nominal cost for spring assist opening for low-pressure and self-draining applications
- Cost-effective solution both in initial cost, as well as lifetime maintenance expenses
- Separate diaphragm chambers protects the diaphragm from the flow stream, while allowing the valve to be serviced in-line
- Constructed of cast iron, brass, stainless steel and Nitrile elastomer components, giving an unparalleled service life
- ¾-inch through 3-inch threaded (N.P.T. or B.S.P.); 3-inch through 6-inch flanged drilled in accordance with ASA16.1 class 125, or BSP4504
- Compatible with wide range of line fluids including air or water applications
- Reinforced diaphragms are pre-formed and stress relieved to maximize responsiveness and product life
- Can be actuated with either air or water as control fluid
Accessories & Options
- Seal and diaphragm materials available
- Handles liquid and gases
- Adaptable to wide variety of control devices
- Spring assist (open or closed)
- Position indicator
- Limit stop for adjustable flow rate control
- High temperature service
- Instructions & Manuals
1163574 (English) Spec Sheet AquaMatic V42 VAV Metal Diaphragm Valves
1163574 (Spanish) Spec Sheet AquaMatic V42 VAV Metal Diaphragm Valves
1163574 (French Canadian) Spec Sheet AquaMatic V42 VAV Metal Diaphragm Valves
1229847 (English) V42 Aquamatic Solenoid Spec Sheet
1229847 (Spanish) V42 Aquamatic Solenoid Spec Sheet
1229847 (French Canadian) V42 Aquamatic Solenoid Spec Sheet
1242190 (English) Aquamatic Two Stage Control Valve
1242190 (Spanish) Aquamatic Two Stage Control Valve
1242190 (French Canadian) Aquamatic Two Stage Control Valve
1230817 (English) Aquamatic EasyNest Spec Sheet
1230817 (Spanish) Aquamatic EasyNest Spec Sheet
1230817 (French Canadian) AquaMatic EasyNest Spec Sheet
- Drawings
42987 Master Chart AquaMatic V42 Metal Diaphragm Valve
1078190 AquaMatic V42 Float Operated Diaphragm Valves
1078117 AquaMatic V42 Series Configuration Drawing
1078113 AquaMatic V42 Solenoid Operated Diaphragm Valves
1077613 AquaMatic V421 Diaphragm Valve ¾ and 1 Metal
1077614 AquaMatic V424 Diaphragm Valve 1¼ and 1½ Metal
1077615 AquaMatic V425 Diaphragm Valve 2 Metal
1077616 AquaMatic V426 Diaphragm Valve 2 and 2½ Metal
1077617 AquaMatic V427 Diaphragm Valve 3 Metal
1077618 AquaMatic V428 Diaphragm Valve 4 Metal