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AqMatic 2 Normally Open Valve K535-X2A1-54000 LS PI SAO Assembly

AquaMatic K535-X2A1-54000 – 2 Inch Normally Open, LS, PI, SAO – BUNA/FKM/FKM

The AqMatic K535-X2A1-54000 is a 2-inch normally open thermoplastic diaphragm valve with limit stop (LS), position indicator (PI), and spring assist open (SAO), designed for systems that require controlled flow adjustment and visual valve position feedback.

This model is part of the K535 series, a glass-filled thermoplastic diaphragm valve platform built for corrosion-resistant operation in water treatment, filtration, and chemical processing systems.

The valve is configured as normally open, allowing flow under standard conditions, with closure achieved through control pressure. The limit stop (LS) allows mechanical restriction of valve travel for flow adjustment, while the position indicator (PI) provides visual confirmation of valve position during operation or maintenance.

The spring assist open (SAO) feature helps the valve return to the open position more quickly and reliably when control pressure is removed, improving cycle consistency in automated systems.

This configuration uses a Buna diaphragm with FKM seals and discs, supporting compatibility across water treatment and more demanding chemical environments.

The valve is commonly used in automated systems with stagers and stager controls, or alongside other diaphragm valves such as V42 diaphragm valves depending on system design.

$1,228.34

Female Socket Weld Connector Kits

PVC female socket weld connectors are available in ASTM, ISO, or JIS pipe standards. These connectors are designed to have PVC pipe glued directly into them. Connector kits consist of two each of the sockets. One kit is needed per valve.

American Standard

Japanese Standard

International Standard

Expedite (5 Days to ship)

Only choose this option if you have talked to an agent who said it is available.

Product price: $1,228.34
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Description

Model Number SKU
K535-X2A1-54000 1076651
Pipe Size Connectors
2 Inch None
Configuration Diaphragm, Seals & Disc
Normally Open, Limit Stop, Position Indicator, Spring Assist Open BUNA N Diaphragm and FKM Seals & Discs
Internal Parts Bosses Drilled & Tapped
Noryl/PVC (140°F, (60°C) Valve Rating) None
Solenoid / Float? Solenoid & Float Options
None
Solenoid Features Float Features

Key Features & Benefits

  • 2-inch K535 thermoplastic diaphragm valve for corrosion-resistant system applications
  • Normally open configuration allows flow by default and closes under control pressure
  • Limit stop (LS) enables mechanical adjustment of valve travel for flow control
  • Position indicator (PI) provides visual confirmation of valve position during operation
  • Spring assist open (SAO) improves return-to-open performance and cycle consistency
  • Buna diaphragm with FKM seals and discs for compatibility in water and chemical systems
  • Thermoplastic construction reduces corrosion risk compared to metal valve alternatives
  • Suitable for filtration, softening, and chemical processing systems requiring adjustable flow control

Additional information

Weight 9 lbs
Dimensions 14 × 12 × 10 in