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Pressure regulator with piston balanced seat valve Low pressure pattern, powder coated
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Product Characteristic |
Overview
Pressure regulators of this type protect downstream installations against excessive supply pressure. By using a pressure regulator, pressurization damage is avoided and water consumption reduced. The set pressure is also maintained constant, even when there is wide inlet pressure fluctuation. Because pressure regulators are subject to wear, they cannot be used as the only means of protection and if the downstream system needs to be protected against excessive pressure to prevent leakage, then a suitable safety valve must be fitted.
Application
Pressure regulators of this type protect downstream installations against excessive supply pressure.
By using a pressure regulator, pressurization damage is avoided and water consumption reduced.
The set pressure is also maintained constant, even when there is wide inlet pressure fluctuation.
Because pressure regulators are subject to wear, they cannot be used as the only means of protection and if the downstream system needs to be protected against excessive pressure to prevent leakage, then a suitable safety valve must be fitted.
Construction
The pressure regulator comprises:
• Valve V16
DN 15 to DN 32 with flanges PN 16 to DIN 86021
DN 40 to DN 150 with flanges PN 16 to DN 2533
• Up to DN 32 with integral strainer
• Regulator R2 including adjustment spring, diaphragm system and control rod
• Control rod with double O-ring seal and intermediate grease chamber
Materials
• Valve housing - up to DN 32: red bronze, from DN 40: cast iron
• Red bronze regulator housing
• Brass spindle guide
• EPDM seals
• Fibre reinforced diaphragm
• Spring steel adjustment spring
• Stainless steel screws and nuts
Special Features
• Regulator with external adjustment spring
• Adjustment spring can be changed during operation
• Spring plate has ball bearings and rotates with movement
• Up to DN 32 with integral strainer
• Adjustment springs colour coded
• Inlet pressure balancing - fluctuating inlet pressure does not
influence outlet pressure
• Valve body (DN 40 and larger) and regulator, powder coated
inside and outside - Powder used is physiologically and toxicologically
safe
• Valve cuts off at zero flow
• May also be used as a differential pressure regulator
Range of Application
Medium : Water, air and steam
Inlet pressure : Maximum 16.0 bar (120 °C) , Maximum 13.0 bar (150 °C)
Outlet pressure : Spring A = 0.16 - 0.5 bar yellow , Spring B = 0.3 - 1.3 bar green, Spring C = 0.7 - 2.0 bar red
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Method of Operation
Spring loaded pressure regulators function on a force equalisation principle. At zero pressure the valve is closed. The force of a diaphragm operates against the force of an adjustment spring. If the outlet pressure and therefore diaphragm force fall because water is drawn, the then greater force of the spring causes the valve to open. The outlet pressure then increases until the forces between the diaphragm and the spring are equal again. The inlet pressure has no influence in either opening or closing of the valve. Because of this, inlet pressure fluctuation does not influence the outlet pressure, thus providing inlet pressure balancing.
Options
D544NP-... A = Regulation from 0.16 - 0.5 bar, spring colour code yellow
D544NP-... B = Regulation from 0.3 - 1.3 bar, spring colour code green
D544NP-... C = Regulation from 0.7 - 2.2 bar, spring colour code red |
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