Dorot - Model 300 Series -Metal Pilot-Operated Valves

The capability to regulate near zero flow, as standard on all sizes, eleminates the need for a special low flow (throttling plug) or valve, while ensuring very low head loss in “fully open” position.

• The flange (face-to-face) dimensions suit ISO Standards.
• The valve has an internal floating shaft, allowing for frictionless operation. The unique design of the shaft provides for easy field maintenance.
• The valve has a resilient seal disc, guided by a frictionless centering device.
• The valve’s body is made of Ductile Iron, withstanding both high hydraulic and mechanical stresses.
• The standard single - chamber valve provides smooth operation in sensitive regulation conditions. When required, conversion from a single to a double chambered valve is easily accomplished through the insertion of Dorot’s innovative separation disc, without the need to remove the valve from the pipeline during the conversion.
• The valve is supplied with a replaceable Stainless Steel seat, which maintains excellent durability against erosion and ensures a drip-tight seal.
• During valve closure the rate slows, preventing potential damage from water hammer or surges.
• The 300 Series includes an optional valve position indicator, attached by a floating connection (ball & socket), resulting in smooth movement, with no wear or tear on the indicator seal.

Waterworks Control Application

Electronic and Remote control:

• EL - Electrically- activated valve
• EC - Electronically- controlled valve

Pressure Regulating

• PR  Pressure Reducing valve:

1. PRM(T2)  Dual Set-Point, Timer-modulated pressure reducing valve 
2. PRM(FM)  Electronically-Controlled, Flow-Modulated
3. PRV / PRM(HyMod)  Hydraulically-Controlled, Flow-Modulated
4. PRV /  PR(D)  Differential Pressure Reducing valve

• PS  Pressure Sustaining valve:

1. PS(R)  Pressure Sustaining/Relief valve
2. DI  Differential- sustaining valve

Rate of Flow Regulating

• FR - Flow-rate control valve
• FE - Rupture- protection valve

Water Level Control

• FL  Water-level control valve
• FLDI1 and FLDI2  Water-level control valve - differential type
• AL  Altitude control valve
• FLEL  Electrically-activated level control valve

1. AL / PR
2. FLDI1 / PR
3. FLDI2 / PR  Combination of water level and flow rate control
4. AL / PS
5. FLDI1 / PS
6. FLDI2 / PS  Combination of water level and back-pressure control

Pumping Systems Control and Water Hammer / Surge Protection

• CV  Check valve
• NS  Two-Stages
• BC  Pump control valve The pump motor is then switched-off by an electric interlink with the valve.

Optional Pump Control valve applications: 

• BC/PS  Pump control and Back-pressure sustaining valve
• BC/CD  Pump control valve with extended closure
• BC/DI    Booster pump control
• DW  Deep well control valve
• QR  Quick-Relief Safety valve
• RE  Surge-anticipating valve, Hydraulic activation
• RE/EL  Surge-anticipating valve, Electric activation
• SP  Surge-preventing closure

Fire Protection Control Application*

• Deluge Valves
• Monitor Valves
• Pressure Reducing Valves
• Pressure Relief Valves