The Dorot Series 300 Pressure-Sustaining (’30-QR’) activates by the pressure of the pipeline. The valve opens instantly when the pressure in the pipeline exceeds the safe level, thus relieving excessive pressure from the network. When the pressure returns to normal, the valve closes slowly, at an adjustable pace.

• Better performance:

- Regulates at a stable mode, regardless of valve-size, down to near-zero flow. Thus, eliminating the need for a special low flow plug-design (such as ‘V-port’) or a bypass valve.

- ‘Floating’, low-friction internal-trim design, guided by unique LPT® device.

• Increased reliability:

- All control ports are fitted with SST sleeves for preventing corrosion-blockage

- Pre-shaped reinforced diaphragm – for easier assembly and improved longevity.

• Reduced periodic inspection\maintenance labor:

- The control-trim is fitted with a self-flushing, inline control-filter.

- Easy in-situ adjustment and maintenance.

• Versatility:

- A standard and simple single-chamber valve design, provides smooth operation.  Conversion to a double chamber is a patented option.

The Dorot Series 300 Surge Anticipating Valve (’30-REEL’) is anautomatic, solenoid controlled surge anticipating valve, activated by the pressure of the pipeline.The valve will maintain a drip tight closed position under normal operating conditions and will open fully when the solenoid is energized; the valve closes at a slow pace preventing secondary surges when the solenoid de-energized. The valve will also open to relief access pressure in the line

The valve opens instantly when the pressure in the pipeline exceeds the safe level, thus relieving excessive pressure from the network. When the pressure returns to normal, the valve closes slowly, at an adjustable pace.

• Hydraulic burst protection.No electronic controllers are used
• Simple and reliable design 
•  Low losses

An electric sensor float, located in the tank/reservoir, sends a command to a solenoid controlled valve. The main valve will fully open when the solenoid activated and will close drip tight when the solenoid de-energized, thus enabling accurate and reliable differential level control. Optional Addition: Stepped Surge-Preventing Closure.

• Accurate and repeatable differential level control
• Low power electric activation
• Fast response
• Simple and reliable design
• Easy installation and maintenance

FLEL - Electric Float-Controlled Valve An automatic, level control valve, activated by an electric float that operates the main valve by a solenoid. Enabling adjustable differential of the max / min levels. Optional addition: surge-preventing closure (SP)