- Van Giảm Áp DM 701
- Model: DM 701
- Hãng: MANKENBERG
Kết nối DN: 15-50
Áp suất danh nghĩa PN: 40
Áp suất đầu vào lên đến: 40 bar
Áp suất đầu ra: 0,02 - 12 bar
Kvs-value: 5 - 22 m³ / h
Nhiệt độ: 190 ° C-
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PRESSURE CONTROL
Pressure reducing valve DM 701
High pressure valve for small flow rates
Technical data
Connection DN 15 - 50
Nominal pressure PN 40
Inlet Pressure up to 40 bar
Outlet Pressure 0.02 - 12 bar
Kvs-value 5 - 22 m³/h
Temperature 190 °C
Medium Steam
*RT = -10 °C up to + 50 °C
Description
Self-acting pressure reducers are simple control valves offering accurate
control while being easy to install and maintain. They control the pressure
downstream of the valve without requiring pneumatic or electrical control elements.
The DM 701 pressure reducing valve is a piston controlled, spring loaded
proportional control valve for small capacities with high pressure drops. The
valve cone is fitted with a metallic seal.
The outlet pressure to be controlled is balanced across the control unit by
the force of the valve spring (set pressure). As the outlet pressure rises
above the pressure set using the adjusting screw, the valve cone moves towards the seat and the volume of medium is reduced. As the outlet pressure
drops, the valve control orifice increases; when the pipeline is depressurised, the valve is open. Rotating the adjusting screw clockwise increases
the outlet pressure.
The valve requires a sense line (to be installed on-site).
These valves are no shut-off elements ensuring a tight closing of the valve.
In accordance with DIN EN 60534-4 and/or ANSI FCI 70-2 they may feature
a leakage rate in closed position in compliance with the leakage classes III
or V, optional IV.
Standard
» Open spring
» Sense line connection
Options
» Mid section for higher temperatures (400 - 500 °C)
» Various diaphragm and seal materials suitable for your medium
» Special versions on request
Technical specification
| Kvsvalues [m3/h] | ||||||
| seat | nominal diameter DN | |||||
| 15 | 20 | 25 | 32 | 40 | 50 | |
| I | 0.2 | 0.25 | 0.25 | 0.4 | 0.4 | 1 |
| II | 0.9 | 0.9 | 0.9 | 2.5 | 2.5 | 3.5 |
| III | 1.8 | 2 | 2.2 | 3.9 | 3.9 | 5.5 |
| Setting ranges [bar] diaphragm controlled | |
| 1.5 - 6 | 6 - 13 |
| Setting ranges [bar] piston controlled | ||
| 12 - 18 | 16 - 24 | 24 - 32 |
| Materials PN 16 | |
| Temperature | 300°C |
| Body, bottom part | cast steel |
| Spring | spring steel C |
| Internal parts, piston | on request |
| O-ring | NBR or EPDM |
| Materials PN 25 - 40 | |||
| Temperature | 300°C | 350°C | 400°C |
| Body, bottom part | cast steel | cast steel | cast steel |
| Mid section | - | - | GS 17 CrMo 55 |
| Spring | spring steel C | spring steel C | spring steel C |
| Internal parts, piston | on request | ||
| O-ring | NBR or EPDM | NBR or EPDM | NBR or EPDM |
| Materials PN 63 - 315 | |||
| Temperature | 350°C | 400°C | 500°C |
| Body, bottom part | C 22 N | C 22 N | 10 CrMo 9-10 |
| Bottom part | cast steel | cast steel | cast steel |
| Mid section | - | GS 17 CrMo 55 | GS 17 CrMo 55 or 10 CrMo 9-10 |
| Spring | spring steel C | spring steel C | spring steel C |
| Internal parts, piston | on request | ||
| O-ring | NBR or EPDM | NBR or EPDM | NBR or EPDM |
| Dimensions [mm] | |||||||
| nominal pres sure |
size | nominal diameter DN | |||||
| 15 | 20 | 25 | 32 | 40 | 50 | ||
| PN 16 - 40 | A* | 130 | 150 | 160 | 180 | 200 | 230 |
| PN 63 - 160 | 210 | 230 | 230 | 260 | 260 | 300 | |
| PN 250 - 315 | 210 | 260 | 260 | 300 | 300 | 350 |
