How it works
Butterfly disc
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
Butterfly valve DNOVA GG25-316L-NBR is designed for use as shut-off or regulating valves for flow control in heat supply systems, water supply systems, in technological processes of food, chemical, oil and gas, pulp and paper and other industries.
Pneumatic rotary actuators DNOVA-DA are designed to automate the process of controlling industrial shut-off valves - gates, ball valves. DNOVA pneumatic actuators are designed for operation both indoors and outdoors. All internal and external parts are anticorrosive coated.
Limit switch unit APL-410N EX is designed for visual and electrical signaling of valve end positions. It is mounted on top of the pneumatic actuator surface and connected to the actuator shaft - DIN standard. The sealed box usually contains two sensors which monitor the position of the actuator shaft and signalize the end positions. Visual indication of the position can be observed on the body of the unit there is a 3D visual indicator RED-CLOSED and YELLOW-OPEN.
Technical parameters of water butterfly valve DNOVA GG25-316L-NBR body material - cast iron GG25, disk material - stainless steel 316L, seal - NBR with pneumatic actuator DA and limit switch block APL-410N EX:
|
Nominal diameter DN, mm |
40 - 300 |
|
Operating pressure PN, bar |
16 |
|
Working medium temperature t, °C |
from -20 to +120 |
|
Working medium |
cold and hot water, air without oil and grease, other media neutral to the material |
|
Flow direction |
two-way |
|
Type of control |
handle |
|
Pipeline connection |
interflange |
|
Body material |
cast iron GG25 |
Materials of water butterfly valve DNOVA GG25-316L-NBR body material - cast iron GG25, disk material - stainless steel 316L, seal - NBR with pneumatic actuator DA and limit switch block APL-410N EX:
|
№ |
Part name |
Material |
|
1 |
Body |
Cast iron GG25 |
|
2 |
Seat seal |
NBR |
|
3 |
Disc |
Stainless steel 316L |
|
4 |
Stem |
SS AISI 416 |
|
5 |
Pin |
SS AISI 420 |
|
6 |
Bushing |
PTFE |
|
7 |
Sealing ring |
NBR |
|
8 |
Plate |
Carbon steel |
Technical characteristics of DNOVA-DA pneumatic actuators:
| Design | Double-acting | |
| Nominal pressure PN, bar | 12 | |
| Operating pressure, bar | 2…8 | |
| Operating medium | Filtered compressed air or non-aggressive gases, oils | |
| Maximum particle diameter | less than 30 µm2 | |
| Operating temperature t, °C | • from -20 to +80 • from -40 to +80 (low-temperature version) • from -20 to +160 (in dry air) |
|
| Adjustment range | ± 5° for rotation at 0° and 90° | |
| Manual duplication | yes | |
| Position indicator | open/closed | |
| Operating environment | indoors and outdoors. (All internal and external parts have an anti-corrosion coating) | |
Pneumatic actuator component materials DNOVA DA:
| № | Name | Material |
| 1 | Body | extruded aluminum |
| 2 | Side caps | cast aluminum |
| 3 | Gear | stainless steel |
| 4 | Piston | steel/aluminum |
| 5 | Plugs | stainless steel |
| 6 | Piston ring | NBR |
| 7 | Springs | spring steel |
| 8 | Piston bearing | engineering plastic |
| 9 | Piston ring | NBR |
| 10 | Plug | NBR |
| 11 | Thrust ring | engineering plastic |
| 12 | Ring | engineering plastic |
| 13 | Washer | stainless steel |
| 14 | Spring clip | stainless steel |
| 15 | Indicator | plastic |
| 16 | Indicator body | plastic |
| 17 | Bearing | engineering plastic |
| 18 | Cam | steel |
| 19 | Bearing | NBR |
| 20 | Bearing | engineering plastic |
| 21 | Bearing | engineering plastic |
| 22 | O-ring | NBR |
| 23 | O-ring | NBR |
| 24 | Bearing | stainless steel |
| 25 | Adjustment nut | stainless steel |
| 26 | Adjustment screw | stainless steel |
| 27 | Bushing | aluminum |
Technical characteristics of limit switch unit APL-410N EX:
| Body | all-weather IP65 explosion-proof Exd IIB T6 |
| Cable glands | 2 x NPT1/2” |
| Terminal strips | 8 points (0.05 - 2.5) mm2 |
| Position indicator | 0 - 90° (90° free rotation) CLOSED - red; OPEN - yellow |
| Switches/sensors | two mechanical switches two proximity sensors |
| Nominal voltage, V | 250 |
| Permissible ambient temperature, °C | from -25 to +80 |
| Service life, years | 10 |
Materials of limit switch unit APL-410N EX:
| Name | Materials |
| Enclosure cover and body | die-cast aluminum |
| Shaft | stainless steel |
| Indicator cover | polycarbonate |
| Cam | polycarbonate |
| Spring | stainless steel |
| Enclosure cover bolts | stainless steel |
| O-ring | NBR |
| Bushing | bronze |
| Sealing ring (shaft) | stainless steel |
| Ground terminal | stainless steel |
| Indicator | ABS plastic / polycarbonate |
| Bracket | stainless steel |
Passports and certificates
Data sheet for DNOVA DA/SA double-acting pneumatic actuator with return springs
- Body material
- Cast iron GG25/EN-GJL-250
- Maximum allowable temperature
- 90 °C
- Connection type
- Compact flanged
- Nominal pressure
- 16 bar
- Type of seal
- NBR
- Disc material
- Stainless steel AISI 316L/1.4404
- Valve feedback
- Limit switches
- Explosion-proof
- Yes
- Torque
- 67 Nm
- Pneumatic actuator
- Yes
- Manual override
- Yes
- Limit switches
- Yes
- Country of origin
- China
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