Description
GENERAL
These single-seated valves are used for modulating control of hot / chilled water or steam in heating, ventilating and air conditioning systems. Not suitable for use in open-circuit systems with oxygen enrichment. The valves can be operated by linear actuators ML6420/ML6425, ML7420/ML7425, ML6421/ML7421, or by pneumatic actuators MP953.
FEATURES
- Iron body with flanged end connections
- Low seat leakage rate
- Metal-to-metal seating for long life span
- Self-adjusting packing
- Accurate positioning to ensure state-of-the-art temperature control
- Easy mounting of direct-coupled electric and pneumatic actuators
- Approved according to DI
| SPECIFICATIONS | |
|---|---|
| Action | Stem down to close |
| Nominal pressure rating | PN16 |
| Flow characteristic | Equal percentage, ngl = 3.4 |
| Rangeability | 50:1 |
| Leakage rate | 0.05% of kVS up to DN50 0.1% of kVS DN65 to DN150 |
| Stroke | 20 mm (DN15 to DN 80) 38 mm (DN100 to DN150) |
| Valve body End connections |
1/2″ bis 2″ |
| Material | Flanged per ISO 7005-2 |
| Dimensions | Cast iron (GG25) |
| Trim Seat |
Stainless steel, replaceable |
| Stem | Stainless steel |
| Plug | Stainless steel, skirt-guided |
| Packing | Spring loaded PTFE cone rings |
| Medium temperature and pressure 20 mm |
2…120 °C; max. 1600 kPa 120…150 °C; max. 1400 kPa 150…170 °C; max. 1370 kPa |
| 38 mm | 2…120 °C; max. 1600 kPa 120…150 °C; max. 1440 kPa 150…200 °C; max. 1280 kPa |
| Maximum temperature differential in alternating hot/cold water use |
60 K |
