How it works
Downstream pressure regulator
The number that matters
Nominal pressure
16bar
The pressure class of the valve body at 20 °C. Working limits depend on the medium and its temperature.
Construction
Parts and materials
Applications
Media and industries
- Air
- Steam
- Superheated Water
- Heat Supply
- Water Supply
High temperature pressure reducing regulator DNOVA PRA-S are designed to automatically maintain a given pressure of the working medium after the regulator (before the object of regulation) by changing the flow rate. They do not work in the absence of flow and in dead-end circuits. High temperature pressure reducing regulator DNOVA PRA-S is equipped with an impulse cooler (supplied with the regulator). The impulse cooler is installed between the pipeline and the membrane chamber, to which the impulse tube is connected. Before commissioning, the regulator cooler is filled with water from the side of the membrane chamber. The installation of an impulse cooler is necessary in order to prevent the high temperature coolant from affecting the membrane. The regulator valve is normally open when there is no signal (energy).
Materials and construction of the regulator DNOVA PRA-S PSI 232 class 125 RF cast iron flange connection
| Valve | |
| 1 | Saddle - stainless steel 40x13 |
| 2 | O-ring (discharge chamber seal) |
| 3 | Valve cover - steel 20 |
| 4 | Glass |
| 5 | Sealing - guides-PTFE, gaskets-EPDM |
| 6 | Stem - stainless steel 40x13 |
| 7 | Plate |
| 8 | Plunger - stainless steel 40x13 |
| 9 | Valve body - cast iron |
| Drive | |
| 10 | Diaphragm piston |
| 11 | Membrane - EPDM on fabric backing |
| 12,15 | Cover |
| 13 | Washer |
| 14,16 | socket ( + ), ( - ) |
| 17 | pin |
| Probe | |
| 18,22 | Trigger spring |
| 19 | Washer |
| 20 | Adjustment nut |
| 21 | Stem |
| 23 | Glass |
| 24 | Sealing unit |
Regulator setting range, bar (mpa) DNOVA PRA-S PSI 232 class 125 RF cast iron flange connection
| 0.1 | 0.08…0.9 (0.008…0.09) | Orange spring |
| 1.1 | 0.16…1.8 (0.016…0.18) | Orange spring |
| 1.2 | 0.24…3.0 (0.024…0.30) | Gray spring |
| 1.3 | 0.4…4.8 (0.04…0.48) | Orange spring + Gray spring |
| 2.1 | 0.5…5.8 (0.05…0.58) | Red spring |
| 2.2 | 0.9…10.0 (0.09…1.0) | Yellow spring |
| 2.3 | 1.4…15.8 (0.14…1.58) |
Red spring + Yellow spring |
Wiring diagram DNOVA PRA-S PSI 232 class 125 RF cast iron flange connection
- Body material
- Cast iron
- Connection type
- Flanged
- Operating environment
- Air, Steam, and Superheated Water
- Applications
- Heat Supply and Water Supply
- Nominal pressure
- 16 bar
- Type of seal
- EPDM
- Locking material
- Stainless steel AISI 201/1.4373
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.
Total items
Product subtotal