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Pressure Management

Pressure Management

PR - PRESSURE REDUCING - FIXED SET-POINT - Series 300

The Dorot Series 300 Pressure-Reducing (’30-PR’) valve, activated by the pressure of the pipeline, The valve reduces high upstream-pressure to a steady, pre-determined and lower downstream pressure, regardless of fluctuations in upstream-pressure or rate of flow. I case the downstream-pressure exceeds the set value, the valve will close drip-tight.

  • 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. 
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PR - PRESSURE REDUCING - FIXED SET-POINT - Series 100

The valve maintains a preset downstream pressure, regardless of upstream pressure or flow rate fluctuation. The main valve is controlled by either a 3-way pilot valve (allowing full opening when upstream pressure drops below the pressure set-point), or by a 2-way pilot valve (creating a minimal differential in open position).
  • Accurate, stable control from no-flow to full flow Simple and reliable design
  • Exceptionally low losses at high flow
  • WRAS Approval no. 04251
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PR - PRESSURE REDUCING - FIXED SET-POINT - Series 500

The valve maintains a preset downstream pressure, regardless of upstream pressure or flow rate fluctuation. The main valve is controlled by either a 3-way pilot valve (allowing full opening when downstream pressure drops below the set-point), or by a 2-way pilot valve (creating minimal pressure differential in open position).

 

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PRM - DUAL SET-POINT Pressure reducing valve - Series 300

The Dorot Series 300 Duel set-point Pressure-Reducing (’30-PRM’) valve, is an automatic, pilot controlled pressure reducing valve.

The valve will regulate downstream pressure to one of two set-values. The set-value is selected by an electric command sent from a PLC controller to the solenoid-valve in the control-trim of the valve. Both pressure values can be easily adjusted by the user. The electric command can be optionally overridden by a manual selector valve.

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PRM(HYMOD) - HYDRAULICALLY ACTUATED, FLOW-MODULATED - Series 300

Dorot model 'HyMod' is an automatic pilot controlled, flow-modulated pressure reducing valve activated by the pressure of the pipeline. The valve reduces upstream pressure to a downstream pressure that increases or decreases simultaneously with the demand flow. The pressure into the zone is continually adjusted according to the zone’s actual demand, thus compensating for the system loss. The pressure-flow profile can be adjusted The Dorot HyMod will control from no flow, to maximal full open flow without any chattering or slamming.

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PR3W - Intermitent Low Supply pressure system - Series 300

Dorot model "PR(3w)" is an automatic, pilot controlled, pressure reducing valve, activated by the pressure of the pipeline. The valve reduces upstream pressure to a steady, predetermined downstream pressure, regardless of fluctuation of upstream pressure and flow rate. Should downstream pressure exceed the required set-point (due, for example, to a halt in pipeline flow), the valve closes drip-tight. If upstream pressure falls to the preset downstream value, and throttling is unwanted, the valve fully opens, with negligible pressure loss. The valve’s response to pressure variation is very rapid, due to its double chamber control. 

The main valve is supplied in two models:
  • Model 30D, 30AD for medium pressure (up to 16 bar / 230 psi)
  • Model 31D,31AD for high pressure (up to 25 bar / 350 psi)
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PR [D] - Differential Pressure Reducing valve - Series 300

Dorot model PR[D] is an automatic, pressure reducing valve, activated by the pressure of the pipeline. The valve creates a fixed ratio between upstream pressure and downstream pressure, regardless of fluctuations of upstream pressure and flow rate. The valve is a double chamber [D]  type.
 
Its control chamber is permanently connected to the downstream. Downstream pressure, applied to the top side of the diaphragm, creates hydraulic power which is balanced by the power created by upstream pressure to the seal disc. The area difference between the diaphragm and the seal disc determines the pressure ratio of approximately 2.7:1. No other control device is needed. Should downstream pressure exceed the above mentioned ratio (due, for example, to a halt in the pipeline flow), the valve closes drip tight. The valve instantly closes when downstream pressure exceeds upstream pressure, serving as a check valve.
 
The main valve is supplied in two models:
  • Model 30D, 30AD for medium pressure (up to 16 bar / 230 psi)
  • Model 31D, 31AD for high pressure (up to 25 bar / 350 psi).
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PRM(T2)-TIMER-CONTROLLED, DUAL SET-POINT

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PRM(E2) - CONTROLLER CONTROLLED, DUAL SET-POINT

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PRM(FM) - ELECTRONICALLY MODULATED W. HYDRAULIC BIAS CHAMBER

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PRM(MOD) - ELECTRONICALLY MODULATED W. PNEUMATIC BIAS CHAMBER

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PRM(Pu) - Hydraulically flow-modulated, Dual Set-point

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EC (CONDOR CONTROLLED)

Dorot Series 300 Electronic Control Valve (’30-EC’) is an automatic, solenoid control valve, activated by the pressure of the pipeline. The valve controls by the versatile DOROT “ConDor” controller that enables all control functions, or combination of functions, at extreme accuracy. Can be controlled by any pulse- activating controller.

  • 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.

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EC-PLC CONTROLLED VALVE - SERIES 100

The valve is controlled by a PLC controller that enables local or remote control of various functions such as, time related operation, the batching of liquid, and conditional (automatically modified) control parameters, in various applications. A recommended option is using the Dorot “ConDor” controller that enables the selection from a vast range of pre-programmed control functions and their combinations.
 
  • Can perform any control function
  • Highly accurate and reliable electronic control • Low power actuation
  • Simple and reliable design
  • Controlled by Dorot ConDor valve controller or by a third party controller
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Condor - Electornic Controller

A specialized controller, designed for the control of hydraulic control valves by the use of dual or quadro solenoid-valves arraignment, for the implementation of a wide range of control applications and combinations of thereof.

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DVC T2 - Time Controller

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