Bronze (Gunmetal) Gate Valve – Screwed Type NPT / BSPT
MATC – Mustafa Ashqar Trading L.L.C., Dubai, UAE supplies Bronze (Gunmetal) Gate Valves with screwed NPT and BSPT threaded connections, designed for dependable ON/OFF isolation in marine piping, water distribution, plumbing, HVAC, shipbuilding and industrial utility systems.
Manufactured from a durable copper-based bronze alloy, these valves feature a handwheel-operated gate mechanism that opens or closes the fluid passage through a multi-turn spindle. When fully open, the gate retracts from the flow path, providing relatively low flow resistance compared with many other valve types.
Bronze gate valves are valued for their corrosion resistance, mechanical durability and suitability for selected marine and industrial environments, subject to the specific bronze alloy and operating conditions.
| Nominal Size | DN Equivalent | End Connection |
|---|---|---|
| 1/4″ | DN8 | Screwed NPT / BSPT |
| 3/8″ | DN10 | Screwed NPT / BSPT |
| 1/2″ | DN15 | Screwed NPT / BSPT |
| 3/4″ | DN20 | Screwed NPT / BSPT |
| 1″ | DN25 | Screwed NPT / BSPT |
| 1-1/4″ | DN32 | Screwed NPT / BSPT |
| 1-1/2″ | DN40 | Screwed NPT / BSPT |
| 2″ | DN50 | Screwed NPT / BSPT |
| 2-1/2″ | DN65 | Screwed NPT / BSPT |
| 3″ | DN80 | Screwed NPT / BSPT |
| 4″ | DN100 | Screwed NPT / BSPT |
| 5″ | DN125 | Screwed NPT / BSPT |
| 6″ | DN150 | Screwed NPT / BSPT |
Bronze / gunmetal body: Provides corrosion resistance for compatible water and industrial fluid services.
Screwed-end construction: Suitable for installation with matching threaded pipes and fittings.
NPT / BSPT thread options: Supports different piping specifications.
Multi-turn handwheel operation: Enables gradual opening and closing of the gate.
Low flow resistance: The gate retracts from the main flow passage when fully open.
Metal-seated construction: Available for durable isolation applications.
Rising or non-rising stem options: Depending on the manufacturer’s design.
Serviceable bonnet designs: Certain models allow maintenance of packing and internal components.
Compact construction: Suitable for machinery spaces, plumbing and mechanical installations.
Marine application potential: Suitable bronze alloys can provide good resistance in specified marine service conditions.
| Specification | Details |
|---|---|
| Product Name | Bronze Gate Valve – Screwed Type |
| Supplier | MATC – Dubai, UAE |
| Valve Type | Manual Gate Valve |
| Body Material | Bronze / Gunmetal Copper Alloy |
| Typical Material Standards | ASTM B62 / ASTM B61 or approved equivalent, model-dependent |
| Bonnet Material | Bronze |
| Gate / Wedge | Bronze / Specified Alloy |
| Stem Material | Bronze / Brass / Specified Alloy |
| Nominal Size Range | 1/4″ – 6″ enquiry range |
| Pressure Rating | Manufacturer-Specified |
| End Connection | Female Screwed |
| Thread Options | NPT / BSPT |
| NPT Thread Standard | ASME B1.20.1 |
| BSPT Thread Standard | ISO 7-1 |
| Seat Construction | Metal-Seated / Specified Design |
| Stem Design | Rising / Non-Rising |
| Bonnet Design | Screwed / Union / Bolted, model-dependent |
| Operation | Manual Handwheel |
| Flow Direction | Generally Bidirectional, subject to design |
| Primary Function | ON/OFF Isolation |
| Typical Media | Water & Compatible Industrial Fluids |
| Temperature Range | Manufacturer-Specified |
| Surface Finish | Natural Bronze / Manufacturer-Specified |
Material note: Bronze and gunmetal are families of copper alloys rather than a single fixed composition. The precise material grade should be confirmed from the manufacturer. Not all bronze alloys are suitable for continuous seawater exposure.
Pressure rating note: The pressure class is intentionally not specified here because it depends on the actual valve model and manufacturer’s certification.
Opening: Turning the handwheel raises the gate away from the flow passage, allowing fluid to pass through the valve.
Closing: Turning the handwheel in the closing direction lowers the gate into the seat, restricting and eventually stopping flow.
Fully open operation: The gate is withdrawn from the flow passage, reducing flow obstruction.
Important: Gate valves should normally be operated fully open or fully closed. Continuous throttling can damage the gate and seating surfaces.
Good corrosion resistance: Suitable for selected water and marine environments.
Reliable isolation: Designed for manual ON/OFF pipeline service.
Low pressure loss: Relatively unobstructed passage when fully open.
Durable construction: Bronze offers strength and resistance to many common water-service conditions.
Convenient installation: Screwed connections suit compatible threaded piping systems.
No external power required: Operates through a manual handwheel.
Serviceable construction: Certain models allow packing and internal maintenance.
Versatile applications: Used in marine, plumbing, HVAC and industrial utility piping.
Long service potential: With appropriate material selection, operation and maintenance.
Not intended for throttling: Prolonged partial opening may cause erosion, vibration and seat damage.
Slower operation: Multi-turn handwheel operation takes longer than quarter-turn ball valves.
Material compatibility: Bronze alloy selection is important for seawater, chemical and high-temperature service.
Thread compatibility: NPT and BSPT threads are different and should not be treated as interchangeable.
Pressure limitations: Maximum working pressure depends on the specific valve design and temperature.
Maintenance: Packing, stem and seating surfaces may require periodic inspection.
Installation considerations: Larger screwed valves can place additional loads on threaded joints.
Potable-water compliance: Drinking-water applications may require approved low-lead materials.
| Industry / Application | Typical Function |
|---|---|
| Marine Piping Systems | Isolation of compatible service fluids |
| Shipbuilding & Ship Repair | Machinery-space piping isolation |
| Water Supply Networks | Water flow isolation |
| Commercial Plumbing | Manual shut-off |
| HVAC Systems | Heating and cooling line isolation |
| Industrial Utilities | Equipment and pipeline isolation |
| Pumping Stations | Pump inlet/outlet isolation where appropriate |
| Fire Protection Auxiliary Systems | Isolation where approved by system requirements |
| Building Mechanical Services | Utility piping isolation |
| General Industrial Plants | Manual fluid isolation |
| Feature | Bronze Gate Valve | Brass Gate Valve |
|---|---|---|
| Typical Material | Bronze / Gunmetal Alloy | Brass Alloy |
| Primary Function | ON/OFF Isolation | ON/OFF Isolation |
| Corrosion Resistance | Alloy-Dependent; Some Marine Grades | Good for Compatible Water Service |
| Marine Suitability | Selected Grades | More Limited |
| Operation | Multi-Turn Handwheel | Multi-Turn Handwheel |
| End Connections | Screwed / Flanged Options | Screwed / Flanged Options |
| Typical Applications | Marine & Industrial Utilities | Plumbing, HVAC & Utilities |
Mustafa Ashqar Trading L.L.C. (MATC) is a Dubai-based stockist and supplier of industrial valves, pipes, pipe fittings, flanges and mechanical piping accessories.
We serve customers across the marine, shipbuilding, oil & gas, petrochemical, construction, HVAC, plumbing and general industrial sectors.
Our Bronze (Gunmetal) Gate Valve – Screwed Type category provides customers with options for durable manual isolation and reliable industrial utility applications.
For enquiries, specify the nominal size, NPT or BSPT connection, required bronze alloy, operating medium, temperature, pressure requirements and quantity.