VMAL – Gear Box Butterfly Valve
The VMAL Gear Box Butterfly Valve is a wafer-type butterfly valve designed for industrial piping systems where reliable flow isolation and practical manual operation are required. The valve uses a compact wafer construction and a gearbox operating arrangement, making it suitable for applications where controlled valve operation is preferred over direct lever operation.
The VMAL butterfly valve is designed for installation between pipeline flanges and is available with a range of material configurations for the main valve components. The manufacturer’s catalog specifies PN16 (200 PSI) working pressure, multiple face-to-face standards, and flange compatibility with several international standards.
The valve is listed for applications including HVAC, water supply and sewage, food and beverage, chemical and petrochemical processing, power and utilities, pulp and paper, and shipbuilding.
Key Features of VMAL Gear Box Butterfly Valve
- Wafer butterfly valve design for compact installation between flanges.
- Gearbox operation for controlled manual opening and closing.
- PN16 / 200 PSI working pressure according to the catalog.
- Face-to-face dimensions based on API 609, BS 5155, DIN 3202, and ISO 5752.
- Flange compatibility with DIN, BS, UNI, ISO, ANSI, AS, and JIS standards.
- ISO 5211 mounting flange for actuator mounting options.
- Multiple body, seat, shaft, disc, pin, bushing, and O-ring material configurations.
- Suitable for HVAC, water, sewage, process industries, utilities, pulp and paper, and shipbuilding applications.
What Is a Gear Box Butterfly Valve?
A gear box butterfly valve is a butterfly valve operated through a gearbox mechanism instead of using a simple direct lever. The gearbox transfers the operator’s input to the valve shaft, allowing the disc to rotate between the open and closed positions.
The butterfly valve itself uses a rotating disc inside the pipeline. When the disc is aligned with the flow direction, the valve is open. When the disc rotates across the pipeline, the valve closes and isolates the flow.
The gearbox provides a practical operating method for butterfly valves, particularly when the valve size or operating conditions make direct manual operation less convenient.
For the VMAL configuration, the valve remains a wafer butterfly valve, while the gearbox provides the operating mechanism.
Wafer Butterfly Valve for Compact Piping Systems
The VMAL is based on a wafer-type butterfly valve construction. The valve is installed between two pipeline flanges, allowing the piping system to maintain a relatively compact layout.
The catalog specifies the face-to-face dimensions according to:
- API 609
- BS 5155
- DIN 3202
- ISO 5752
These standards are important when selecting a butterfly valve for a new installation or replacing an existing valve because the face-to-face dimension affects the available installation space and connection arrangement.
The catalog also lists flange standards including DIN, BS, UNI, ISO, ANSI, AS, and JIS.
Before ordering, the required flange standard should therefore be confirmed against the existing pipeline.
Gearbox Operation for Manual Valve Control
One of the defining characteristics of the VMAL Gear Box Butterfly Valve is its gearbox operating arrangement.
Instead of applying the operating force directly to the valve shaft, the gearbox provides mechanical transmission between the operator and the butterfly valve disc. This arrangement can make manual operation more practical for larger valve sizes.
The gearbox can also provide more controlled movement of the valve during opening and closing. This is useful where the operator needs to adjust the valve position carefully rather than making a quick quarter-turn movement with a direct handle.
The catalog itself identifies the valve as a wafer butterfly valve and specifies an ISO 5211 mounting flange.
For a specific VMAL order, the exact gearbox configuration and operating torque should be confirmed according to the selected valve size.
PN16 / 200 PSI Working Pressure
The manufacturer’s catalog specifies a PN16 (200 PSI) working pressure for the wafer butterfly valve.
This rating should be compared with the actual operating pressure of the pipeline before selecting the valve.
For engineering selection, the pressure rating should not be considered separately from the process conditions. The user should also identify the process medium, operating temperature, valve size, seat material, and body material.
For systems operating near the rated pressure, the actual application conditions should be checked against the valve manufacturer’s technical requirements.
VMAL Butterfly Valve Material Options
The catalog provides multiple material options for the main valve components. This allows the butterfly valve configuration to be adapted to different service conditions.
The listed body materials include:
- Cast Iron
- Ductile Iron
- Carbon Steel
- Stainless Steel
Seat materials include:
- NBR
- EPDM
- Viton
- Neoprene
- Hypalon
- Silicone
- PTFE
The catalog also lists several shaft materials, including Stainless Steel 416, 316, and 304. Disc options include Ductile Iron + Ni, CF8, CF8M, and Bronze.
Other listed component materials include Stainless Steel, PTFE, Bronze, NBR, and EPDM depending on the selected configuration.
Therefore, the exact material configuration should be specified when requesting a quotation rather than assuming that every VMAL valve uses the same internal materials.
Available Valve Sizes
The catalog provides dimensional data for a wide range of butterfly valve sizes, including sizes from DN50 through DN1200 in the dimensional tables.
The larger valve sizes are particularly relevant to industrial piping systems where a gearbox-operated butterfly valve can provide a practical method of manual operation.
Typical nominal sizes listed in the catalog include:
DN50, DN65, DN80, DN100, DN125, DN150, DN200, DN250, DN300, DN350, DN400, DN450, DN500, DN600, DN700, DN750, DN800, DN900, DN1000, DN1050, and DN1200.
The exact dimensions vary according to the selected valve size and connection configuration. The catalog provides dimensional tables for the corresponding configurations.
ISO 5211 Mounting Flange
The VMAL butterfly valve includes an ISO 5211 mounting flange according to the catalog.
ISO 5211 is relevant when integrating an actuator or operating device with the valve. This means the valve platform can be considered for applications where manual operation may later be replaced or supplemented by automated operation, subject to correct actuator sizing and compatibility.
When selecting an actuator, the required operating torque should be checked against the valve’s actual operating conditions, including pressure, medium, temperature, and seat configuration.
Applications of VMAL Gear Box Butterfly Valve
The manufacturer identifies several application areas for this wafer butterfly valve.
HVAC
The VMAL can be considered for HVAC piping systems requiring compact isolation or flow-control valves. The wafer construction helps maintain a compact installation arrangement.
Water Supply and Sewage
The valve is listed for water supply and sewage applications. The appropriate body and seat materials should be selected according to the actual fluid and operating conditions.
Food and Beverage
Food and beverage processing is also included among the listed applications. For specific hygienic applications, the complete valve material and process requirements should be confirmed before selection.
Chemical and Petrochemical Processing
The VMAL can be used for selected chemical and petrochemical process applications. For these services, seat and body compatibility with the actual process medium should be carefully checked.
Power and Utilities
The valve is also listed for power and utility applications, where butterfly valves are commonly used for isolation and flow management within piping networks.
Pulp and Paper
Pulp and paper is another application area identified in the manufacturer’s catalog.
Shipbuilding
The catalog also identifies shipbuilding as an application field for the valve.
How to Select the Right VMAL Butterfly Valve
Selecting the correct VMAL configuration starts with the actual pipeline requirements.
1. Select the nominal valve size
Confirm the pipeline DN size. The catalog provides dimensional information covering a wide range of nominal diameters.
2. Check the pressure rating
The standard working pressure specified in the catalog is PN16 / 200 PSI.
3. Select the seat material
Choose the appropriate seat material based on the process medium and operating temperature. Available materials include NBR, EPDM, Viton, Neoprene, Hypalon, Silicone, and PTFE according to the catalog.
4. Select the body material
The available body materials include Cast Iron, Ductile Iron, Carbon Steel, and Stainless Steel.
5. Confirm the flange standard
Check the pipeline connection against DIN, BS, UNI, ISO, ANSI, AS, or JIS requirements.
6. Confirm the operating method
For the VMAL configuration, the valve is specified with a gearbox operating arrangement. If automation is required, the ISO 5211 mounting interface should also be considered.
VMAL Gear Box Butterfly Valve for Industrial Piping
The VMAL Gear Box Butterfly Valve combines a compact wafer butterfly valve construction with gearbox operation for practical manual control of industrial piping systems.
With a PN16 / 200 PSI working pressure, multiple flange standards, recognized face-to-face dimensions, and a broad range of material options, the VMAL can be specified for different industrial piping requirements.
The catalog identifies applications across HVAC, water supply and sewage, food and beverage, chemical and petrochemical processing, power and utilities, pulp and paper, and shipbuilding.
VMAL Gear Box Butterfly Valve – Technical Specifications
| Specification | VMAL Gear Box Butterfly Valve |
|---|---|
| Valve type | Wafer Butterfly Valve |
| Operation | Gearbox |
| Working pressure | PN16 / 200 PSI |
| Face-to-face | API 609, BS 5155, DIN 3202, ISO 5752 |
| Flange standards | DIN, BS, UNI, ISO, ANSI, AS, JIS |
| Mounting flange | ISO 5211 |
| Body materials | Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel |
| Seat materials | NBR, EPDM, Viton, Neoprene, Hypalon, Silicone, PTFE |
| Shaft materials | Stainless Steel 416, 316, 304 |
| Disc materials | Ductile Iron + Ni, CF8, CF8M, Bronze |
| Size range listed | DN50–DN1200 |
| Applications | HVAC, water & sewage, food & beverage, chemical/petrochemical, power & utilities, pulp & paper, shipbuilding |
Request a Quote for VMAL Gear Box Butterfly Valve
Need a VMAL Gear Box Butterfly Valve for an industrial piping project?
Send us the required DN size, flange standard, working pressure, process medium, seat material, body material, and quantity. Our engineering team can check the appropriate VMAL configuration based on the actual application requirements.
Contact us today to request a quotation for the VMAL Gear Box Butterfly Valve.
