How it works
Double-acting rotary actuator
Butterfly disc
5/2 single-solenoid pilot
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
A water butterfly valve is a type of valve used to control the flow of water or other fluids through a pipeline. It gets its name from the butterfly-shaped disc inside the valve that rotates to open or close the flow. When the valve is fully open, the disc is positioned parallel to the flow direction, allowing unobstructed passage of water. When the valve is closed, the disc is turned perpendicular to the flow, effectively blocking the flow of water. Water butterfly valves are commonly used in various industries and applications, including water treatment plants, sewage systems, irrigation systems, and industrial processes. They are known for their compact design, lightweight construction, and ease of installation. These valves are often preferred for their quick operation, as the disc can be opened or closed with a simple quarter-turn motion. Butterfly valves can be operated manually with a handle or lever, or they can be automated using electric, pneumatic, or hydraulic actuators to control the valve remotely. They are known for their low-pressure drop and relatively low cost compared to other types of valves. It's worth noting that water butterfly valves are specifically designed for use with water and compatible fluids. Different materials and designs may be required for valves intended for use with corrosive or high-pressure fluids. It's important to select the appropriate type of butterfly valve based on the specific application and fluid requirements.
Main parameters of butterfly valves DNOVA GG25-316L-NBR DN40-300 Ru16
| Nominal diameter DN, mm | 40-300 |
| Working pressure PN, bar | 16 |
| Temperature of working environment t, °C | from -20 to +90 |
| Working environment | water, mineral oils, hydrocarbons, oils, fats |
| Direction of flow | bilateral |
| Body material | cast iron GG25 |
| Control type | manual (handle) |
| Addition | installation of electric or pneumatic drive is possible (ISO 5211-2001) |
| Nominal pressure PN, MPa (kg/cm2) | 1,2 (12) |
| Working pressure, bar | 2...8 |
| Working environment | Filtered compressed air or non-aggressive gases, oils |
| Maximum particle diameter | Less than 30 µm2 |
| Operating temperature, °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 | There is |
| Position indicator | open/closed |
| Operating environment | indoors and outdoors (all internal and external parts have anti-corrosion coating). |
Technical characteristics of the pneumatic distributor 4M310-08 NAMUR
| Design | Spool-type |
| Test pressure (body strength test. Not for operation!), bar | 10 |
| Working pressure (recommended range for normal operation), bar | 1.5 ÷ 8 |
| Valve type | 5/2 five-port, two-position |
| Working medium | purified air (40 µm filter fineness) |
| Operating temperature, °C | 0 to +60 |
| Actuation frequency | 5 cycles per second |
| Manual override | yes |
| Protection rating/insulation class | IP65/F |
| Connection to pneumatic actuator | NAMUR-compliant mounting surface (VDI/VDE3845) |
| Body material | anodized aluminum |
| Effective cross-sectional area, mm2 | 25 (Cv = 1.4) |
| Exhaust port dimensions (vent to atmosphere) | 2 - PT1/4” |
| Air inlet port size (to pneumatic valve) | G1/4” |
| Air outlet port size (to pneumatic actuator) | 2 x Ø19.2 mm |
| Response time, sec | 0.05 |
| Supply voltage, V | 220AC/24DC |
| Coil power | 220VAC – 5.5 VA/24VDC – 4.8 W |
| Weight, kg | 0.35 |
| Average service life, cycles | 10,000,000 |
Overall and installation dimensions of the pneumatic distributor 4M310-08 NAMUR
| A | C | D | E | F | G | H | I | K | L | J | N | M |
| mm | ||||||||||||
| 40 | 24 | 28 | 32 | 40 | 21,5 | 69 | 45 | 17,5 | 135 | 29,3 | 40 | 27 |
Sketch of the dimensions of the pneumatic distributor 4M310-08 NAMUR
Basic materials and parts of the pneumatic distributor 4M310-08 NAMUR
| № | Part Name | Material |
| 1 | Connector | Engineering plastic |
| 2 | Nut | POM + carbon steel |
| 3 | Coil | Copper |
| 4 | Control Elements | — |
| 5 | Plate | Carbon steel |
| 6 | Piston | POM |
| 7 | Control Valve Seat | Engineering plastic |
| 8 | Valve Body | Aluminum alloy |
| 9 | Spool | Aluminum alloy |
| 10 | O-Ring Seal | HNBR |
| 11 | Rear Cover | Engineering plastic |
| 12 | Filter | Synthetic material |
| 13 | Piston | POM |
| 14 | Spring | Stainless steel |
| 15 | Manual Override | Engineering plastic |
| 16 | Rear Seat | Aluminum alloy |
| 17 | Spring Seat | Aluminum alloy |
| 18 | Type C Towing Shackle | 65Mn |
Sketch of the dimensions of the pneumatic distributor 4M310-08 NAMUR
Main parameters of the limit switch unit
| Meaning | Execution | Option |
| Maximum current | 5 A | - |
| Maximum voltage | 250 V | - |
| Explosion protection | No | - |
| Protection | All-weather IP65 | IP67 |
| Ambient temperature | From -40°C to +80°C | From -50°C to +80°C |
| Cable entry 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 NPN inductive sensors, 2 NAMUR proximity switches |
| External coating | Polyester coating (black) | red, green, yellow, blue |
| Shaft | Standard shaft (17mm) | Extended shaft |
- Body material
- Cast iron GG25/EN-GJL-250
- Maximum allowable temperature
- 90 °C
- Connection type
- Compact flanged
- Control type
- Pneumatic actuator
- Nominal pressure
- 16 bar
- Type of seal
- NBR
- Disc material
- Stainless steel AISI 316L/1.4404
- Voltage
- 110/220V
- Valve feedback
- Limit switches
- Explosion-proof
- No
- Torque
- 490 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