Items
Pressure Retaining Valve made of PVDF - back pressure safe
Type: RCT®-ST-712
Product specification
Resistant to corrosion and weather
High impact toughness even at low temperatures
High mechanical stability
High chemical resistance
Technical specification
Material:
Lower valve body: PVDF (polyvinylidene fluoride), yellowish-white
Upper valve body: PP (polypropylene), glass fibre-reinforced, orange (RAL 2005)
Piston: PVDF (polyvinylidene fluoride)
Separation disc: PVDF (polyvinylidene fluoride)
Diaphragm: EPDM (ethylene-propylene-diene rubber), on media side PTFE-coated (polytetrafluoroethylene)
Valve seat seal: EPDM (ethylene-propylene-diene rubber); FPM (fluorinated rubber)
O-ring sealings of union ends: EPDM and FPM resp.
Connecting screws: stainless steel 1.4301 (V2A)
Media: technically pure, neutral and aggressive liquids provided that the selected valve materials are resistant at working temperature
Max. temperature: +100 °C
Max. operating pressure: 10 bar at +20 °C
Pressure setting range: 0.3 - 10 bar
Pressure settings: in 0.5 bar steps, between 0.5 and 10 bar
Release pressure: approx. 0.5 bar
Hysteresis: approx. 0.3 bar
Mounting position: optional
Connection: butt fusion spigot or socket fusion spigot or screw joint with welded socket
General Information
In process plants for maintenance of working- or system-induced counter pressures as well as for reduction of pressure pulsation. The special diaphragm design and the interaction of diaphragm surface, valve piston and valve seat keep the working pressure at occurring counter pressure almost constant.
As pressurizing valve in metering pumps for guarantee of metering accuracy. In case of counter pressure at the secondary side the preliminary pressure and thus the metering quantity remain constant.
In all working areas where constant pressure is required.
Operating principle:
Does the working pressure or inlet pressure rise above a certain preset pressure value, the pressurized valve piston is lifted against the spring force. The valve opens and a pressure relief on the outlet side takes place. It closes as soon as the working pressure at the valve piston drops below preset spring force. If a system determined counter pressure arises at the secondary side this pressure has an impact on both simultaneously, namely under the diaphram and on the valve piston, i.e. the forces cancel out each other because the diaphragm and the valve mating surface / effective surface are the same size. The valve force and thus the working pressure remain nearly constant.
| Position | Item | NW mm |
Connection | Material gasket | Unit piece |
Price Euro |
Buy |
|---|---|---|---|---|---|---|---|
| 1 | 350839 | 10 | butt fusion spigot or socket fusion spigot 16 mm | EPDM | 1 | 672.00 | Warenkorb |
| 2 | 350840 | 15 | butt fusion spigot or socket fusion spigot 20 mm | EPDM | 1 | 672.00 | Warenkorb |
| 3 | 350841 | 20 | butt fusion spigot or socket fusion spigot 25 mm | EPDM | 1 | 1,010.00 | Warenkorb |
| 4 | 350842 | 25 | butt fusion spigot or socket fusion spigot 32 mm | EPDM | 1 | 1,010.00 | Warenkorb |
| 5 | 350843 | 32 | butt fusion spigot or socket fusion spigot 40 mm | EPDM | 1 | 1,590.00 | Warenkorb |
| 6 | 350844 | 40 | butt fusion spigot or socket fusion spigot 50 mm | EPDM | 1 | 1,590.00 | Warenkorb |
| 7 | 350845 | 50 | butt fusion spigot or socket fusion spigot 63 mm | EPDM | 1 | 1,590.00 | Warenkorb |
| 8 | 350846 | 10 | screw joint with welded socket 16 mm | EPDM | 1 | 708.00 | Warenkorb |
| 9 | 350847 | 15 | screw joint with welded socket 20 mm | EPDM | 1 | 708.00 | Warenkorb |
| 10 | 350848 | 20 | screw joint with welded socket 25 mm | EPDM | 1 | 1,060.00 | Warenkorb |
| 11 | 350849 | 25 | screw joint with welded socket 32 mm | EPDM | 1 | 1,080.00 | Warenkorb |
| 12 | 350850 | 32 | screw joint with welded socket 40 mm | EPDM | 1 | 1,646.00 | Warenkorb |
| 13 | 350851 | 40 | screw joint with welded socket 50 mm | EPDM | 1 | 1,682.00 | Warenkorb |
| 14 | 350852 | 50 | screw joint with welded socket 63 mm | EPDM | 1 | 1,742.00 | Warenkorb |
| 15 | 350853 | 10 | butt fusion spigot or socket fusion spigot 16 mm | FPM | 1 | 684.00 | Warenkorb |
| 16 | 350854 | 15 | butt fusion spigot or socket fusion spigot 20 mm | FPM | 1 | 684.00 | Warenkorb |
| 17 | 350855 | 20 | butt fusion spigot or socket fusion spigot 25 mm | FPM | 1 | 1,018.00 | Warenkorb |
| 18 | 350856 | 25 | butt fusion spigot or socket fusion spigot 32 mm | FPM | 1 | 1,018.00 | Warenkorb |
| 19 | 350857 | 32 | butt fusion spigot or socket fusion spigot 40 mm | FPM | 1 | 1,574.00 | Warenkorb |
| 20 | 350858 | 40 | butt fusion spigot or socket fusion spigot 50 mm | FPM | 1 | 1,574.00 | Warenkorb |
| 21 | 350859 | 50 | butt fusion spigot or socket fusion spigot 63 mm | FPM | 1 | 1,576.00 | Warenkorb |
| 22 | 350860 | 10 | screw joint with welded socket 16 mm | FPM | 1 | 722.00 | Warenkorb |
| 23 | 350861 | 15 | screw joint with welded socket 20 mm | FPM | 1 | 728.00 | Warenkorb |
| 24 | 350862 | 20 | screw joint with welded socket 25 mm | FPM | 1 | 1,066.00 | Warenkorb |
| 25 | 350863 | 25 | screw joint with welded socket 32 mm | FPM | 1 | 1,644.00 | Warenkorb |
| 26 | 350864 | 32 | screw joint with welded socket 40 mm | FPM | 1 | 1,660.00 | Warenkorb |
| 27 | 350865 | 40 | screw joint with welded socket 50 mm | FPM | 1 | 1,700.00 | Warenkorb |
| 28 | 350866 | 50 | screw joint with welded socket 63 mm | FPM | 1 | 1,760.00 | Warenkorb |