Series GV-420 Rotary Control Valve
VQ-GV420
Pneumatic control valve, sizes DN50 to DN300, kvs 60 to 2,400 m³/h.
- SIZES
- DN50 to DN300
- KVS
- 60 to 2,400 m³/h
- RATING
- PN25
- LEAKAGE
- Class VI with a soft seat
Why it is specified
Sized on the process data, never on the line size. Send three flow cases and the inlet and outlet pressures and the selection comes back with a Kv, a trim characteristic and a noise estimate.
Typical applications
- Boiler feedwater control
- Chemical dosing
- Steam pressure reduction
- Temperature control loops
Options and executions
- Bellows sealed bonnet
- Low noise cage trim
- NACE MR0175 materials
- Partial stroke testing
The full table.
Figures cover the whole series. The variant table below narrows them to a part number.
PERFORMANCE
- Flow coefficient Kvs
- 60 to 2,400 m³/h
- Trim characteristic
- Modified equal percentage
- Rangeability
- 100 to 1
- Seat leakage
- Class VI with a soft seat
- Travel
- 60 degrees rotation
MATERIALS
- Body
- EN-GJS-400-15 ductile iron, epoxy coated
- Trim
- 1.4408 disc, PTFE seat
- Packing
- PTFE chevron
- Actuator
- Multi-spring diaphragm, cast aluminium
CONNECTIONS AND RATINGS
- Sizes
- DN50 to DN300
- Connections
- EN 1092-1 flanged, raised face
- Pressure rating
- PN25
- Temperature range
- -20 to +180 °C
- Signal
- 4 to 20 mA, HART 7
Stocked frame sizes.
| PART NUMBER | SIZE | FLOW COEFFICIENT | BODY MATERIAL | RATING |
|---|---|---|---|---|
| VQ-GV420-10 | DN50 | Kvs 60 | EN-GJS-400-15 ductile iron, epoxy coated | PN25 |
| VQ-GV420-20 | DN150 | Kvs 640 | EN-GJS-400-15 ductile iron, epoxy coated | PN25 |
| VQ-GV420-30 | DN300 | Kvs 2,400 | EN-GJS-400-15 ductile iron, epoxy coated | PN25 |
GV-420, DS-GV-420
The datasheet is issued with the selection rather than downloaded blind, so the figures that arrive are the ones for your duty point. Ask for it with the quotation and it comes back as a PDF.
What is in it
- Selection data and the limits each figure applies at
- Dimensional drawings for every size in the variant table
- Materials of construction and the compatibility notes
- Installation, commissioning and maintenance intervals
- Spare parts list with the part numbers
Elsewhere in the catalogue.
GV-200
Top-guided single-seat globe valve with a multi-spring diaphragm actuator and a digital positioner, for modulating control on liquid, gas and steam.
BF-300
Wafer and lugged resilient-seated butterfly valve with a moulded liner, bi-directional and bubble tight to the full rating, for isolation on water, air and neutral media.
GV-120
Pneumatic control valve, sizes DN15 to DN50, kvs 0.4 to 40 m³/h.
GV-240
Pneumatic control valve, sizes DN25 to DN150, kvs 8 to 200 m³/h.
Quote the GV-420 for your duty.
Send the process data and the line size. The quotation comes back with the selection, the calculation and the lead time on the stocked variants.
Vanteq Industrial is a fictional company created for demonstration purposes. This product does not exist. The specifications, performance figures, materials and datasheet references on this page are illustrative and must not be used to select, size or buy equipment.