Parts
How it works
Spring-return rotary actuator
Butterfly disc
Limit-switch box
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 valves DNOVA al-316l-epdm are designed for use as shut-off or regulating valves for flow control in heat and water supply systems, in technological processes of food, chemical, oil and gas, pulp and paper and other industries. Butterfly valves should be installed only between collar flanges.
Pneumatic double-acting rotary actuators and pneumatic rotary actuators with return springs are designed for automation of control process of 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 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 GREEN-OPEN.
Technical parameters of water butterfly valve DNOVA al-316l-epdm-DNOVA-sa-apl210n, body material - aluminium alloy, disk material - stainless steel AISI 316L, seal - EPDM, pneumatic actuator operated:
|
Nominal diameter DN, mm |
25–32 |
|
Operating pressure PN, bar |
16 |
|
Working medium temperature t, °C |
From -20 to +120 |
|
Working medium |
Cold and hot water, oil-free and grease-free air, other media neutral to the material |
|
Flow direction |
Two-way |
|
Body material |
Aluminum alloy |
|
Type of control |
Manual (handle) |
|
Additional option |
Electric or pneumatic actuator installation possible (ISO 5211-2001) |
|
Nominal pressure PN, MPa (kg/cm²) |
1.2 (12) |
|
Operating pressure, bar |
2...8 |
|
Working medium |
Filtered compressed air or non-aggressive gases, oils |
|
Maximum particle diameter |
Less than 30 µm² |
|
Operating temperature, °C |
-20 to +80 |
|
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 are anti-corrosion coated) |
Main parameters of the limit switch unit:
|
Value |
Execution |
Option |
|
Maximum current |
5 A |
- |
|
Maximum voltage |
250 V |
- |
|
Explosion protection |
No |
- |
|
Protection |
Weatherproof IP65 |
IP67 |
|
Ambient temperature |
From -40°C to +80°C |
From -50°C to +80°C |
|
Cable gland thread |
2 x NPT1/2” |
PF1/2′′, P1/2′′M20x15, PG13.5 |
|
Terminal block |
8 cells 0.08-2.6mm2 |
- |
|
Indicator position |
CLOSED: red OPEN: green |
CLOSED: red OPEN: yellow |
|
Sensor |
2 SPDT electromechanical microswitches OMRON V151-1C25 |
2 inductive sensors NPN, 2 Namur non-contact switches |
|
External coating |
Polyester coating (black) |
Red, green, yellow, blue colors |
|
Shaft |
Standard shaft (17mm) |
Extended shaft |
- Body material
- Aluminium alloy
- Maximum allowable temperature
- 120 °C
- Connection type
- Compact flanged
- Control type
- Pneumatic actuator
- Nominal pressure
- 16 bar
- Type of seal
- EPDM
- Disc material
- Stainless steel AISI 316L/1.4404
- Valve feedback
- Limit switches
- Explosion-proof
- No
- Torque
- 25 Nm
- Pneumatic actuator
- No
- 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.