Dorot S100 PS Series Cast Iron Basic Hydraulic Pressure Reducing/Sustaining Valves with 3-Way Selector

The Dorot S100 PS Series is a dual-function hydraulic control valve that combines pressure reducing and pressure sustaining capabilities in a single, compact valve body. Engineered for precision and durability, this valve ensures downstream pressure regulation while simultaneously maintaining a minimum upstream pressure—ideal for complex irrigation networks, filtration systems, and water distribution applications where balanced system pressure is critical.

Fitted with an integrated 3-Way Pressure Selector Valve, the S100 PS model offers fast and easy manual control in the field. Operators can instantly switch between automatic operation, manual open, or manual closed modes—greatly simplifying servicing, commissioning, or emergency response without disassembly or special tools.

Controlled via dual pilot valves, the S100 PS continuously monitors upstream and downstream pressure, modulating the diaphragm-actuated main valve to maintain both setpoints. Built from durable cast iron and coated for corrosion resistance, it delivers smooth modulation, tight sealing, and dependable performance under varying flow and pressure conditions.

FEATURES

• Function: Hydraulic Pressure Reducing
• Body Style: Globe-pattern (inline flow)
• Available Sizes: DN80 to DN150 (3" – 6")
  
• Max Fluid Temperature: 60°C (140°F)
• End Connections: Threaded, Flanged
• Body Material: Cast Iron 
• Bonnet: Cast Iron 
• Diaphragm: Reinforced Natural Rubber (optional: NBR, EPDM, Neoprene)
• Spring: Stainless Steel 302 
• Coating: Polyester Epoxy, Rubber, or Nylon
• Relay Valve Manual Override: Built-in 3-position selector

BENEFITS

• Dual-function valve simplifies system design by combining two pressure control functions in one
• Integrated 3-way selector enables manual override for open/close/automatic operation
• Smooth, accurate modulation using pilot-controlled diaphragm actuation
• Robust cast iron construction with protective coating for harsh environments
• Low head loss with high flow capacity
• Ideal for irrigation manifolds, pump protection, pressure zones, and filter heads
• Compatible with a wide range of Dorot pilots and accessories