The AqMatic AquaMatic V42C-0021-00000 Diaphragm Valve is a 1-inch, normally open valve with position indicator and spring assist open functionality, designed for reliable flow control in water treatment and industrial fluid handling systems. Built with a female NPT threaded connection and cast iron body, this valve supports consistent operation in applications where maintaining open flow and monitoring valve position are critical.
Within the valve assembly, the diaphragm and internal components regulate flow while maintaining proper sealing during operation. The integrated position indicator provides visual confirmation of valve status, improving system monitoring and troubleshooting. The spring assist open configuration adds mechanical force to help return the valve to the open position, particularly in low-pressure or self-draining systems. The V42 series y-pattern design allows higher flow rates with reduced pressure loss while supporting smooth diaphragm movement and long-term reliability.
$334.03
Aquamatic – V42C-0021-00000 – 421 – 1″ – Normally Open, Position Indicator, Spring Assist Open
| Part Number | V42C-0021-00000 |
| SKU | 1072648 |
| Model | 421 |
| Pipe Size | 1″ |
| Pipe Connection | Female NPT Threaded |
| Body & Cap Mat’l | Cast Iron – Red Primer |
| Valve Option | Normally Open, Position Indicator, Spring Assist Open |
| Seal/Diaphragm/Disk (kit suffix) | Buna / Buna / Buna (RA) |
| Internal Parts | Brass, Stainless Steel |
| Drill & Tap Bosses | None |
| Solenoid Option | None |
| Solenoid Feature | None |
| Approximate Ship Weight (lbs.) | 3.5 |
Features and Benefits
Low Pressure Loss – The unique AquaMatic Diaphragm Valve’s y-pattern design, with large seat opening and high lift disc, permits higher flow rates at lower pressure loss than other comparable valves.
Cost-Effective Design – The AquaMatic V42 Valve is a cost-effective solution in initial purchase price as well as in lifetime maintenance. All components can be serviced while the valve is in-line.
Durable – The AquaMatic V42 Valve features cast iron, brass, stainless steel, and nitrile elastomer components. The valve features an average life of 3 years or longer depending upon cycling rate and environment.
Pipe Sizes – 3/4- to 3-inch threaded (NPT or BSP); 3- to 4-inch flanged drilled in accordance with ASA16.1 class 125, or BSP4504.
| Weight | 4.0 lbs |
|---|---|
| Dimensions | 9 × 7 × 5 in |
