Midland Industries
Midland Lug-Style Butterfly Valve w/ Buna-N Seat & Gear Handle
- Availability:
- Allow 2-3 Days to Ship
- Weight:
- 0.00 LBS
Description
Midland Lug-Style Butterfly Valve w/ Buna-N Seat & Gear Handle
Midland Lug-Style Butterfly Valves with Buna-N Seats and Gear Handles are designed for dependable shutoff and flow control in compatible commercial and industrial piping systems.
These valves feature a rugged ductile iron body, ductile iron disc, resilient Buna-N (NBR) seat, and manual gear operator with handwheel. The lug-style body installs between compatible ANSI Class 125/150 flanges and can support dead-end service where permitted by the manufacturer and application requirements.
Product Highlights
- Midland lug-style butterfly valve
- Heavy-duty ductile iron body
- Ductile iron disc
- Resilient Buna-N (NBR) seat
- Manual gear operator with handwheel
- Controlled opening and closing
- Bidirectional bubble-tight shutoff
- Compatible with ANSI Class 125/150 flanges
- Lug-style body allows independent flange bolting
- Suitable for dead-end service where permitted
- Designed for water and other Buna-N compatible fluids
Technical Specifications
| Product Type | Lug-Style Butterfly Valve |
|---|---|
| Brand | Midland |
| Body Material | Ductile Iron |
| Disc Material | Ductile Iron |
| Seat Material | Buna-N (NBR) |
| Body Style | Lug |
| Operator | Manual Gear Operator |
| Operator Control | Handwheel |
| Flange Compatibility | ANSI Class 125/150 |
| Flow Direction | Bidirectional |
| Shutoff | Bubble-Tight Resilient Seat |
| Primary Function | Shutoff and Throttling |
| Typical Service | Water and Other Buna-N Compatible Fluids |
Valve Configuration
Lug-Style Body
Threaded body lugs allow each mating flange to be bolted independently for secure installation and easier system maintenance.
Ductile Iron Disc
The ductile iron disc rotates through the flow path to provide shutoff or intermediate positioning within the valve's operating range.
Gear Operator
The manual gearbox reduces operating effort and allows smoother, more controlled movement of the valve disc.
Construction Details
The Midland lug-style butterfly valve uses a heavy-duty ductile iron body designed for strength and dependable performance in demanding piping systems.
A ductile iron disc works against the resilient Buna-N seat to provide reliable sealing and bidirectional shutoff.
The enclosed gear operator provides mechanical advantage for controlled opening, closing, and positioning while reducing the manual force required at the handwheel.
Why Choose a Gear-Operated Butterfly Valve?
Reduced Operating Effort
- Gear reduction increases mechanical advantage
- Reduces required handwheel force
- Useful where valve torque is higher
- Smooth opening and closing
- Well suited for larger or frequently operated valves
Controlled Positioning
- Gradual disc movement
- Supports intermediate positions
- Useful for throttling where permitted
- Helps reduce abrupt flow changes
- Provides stable manual control
Buna-N Seat
Resilient Sealing
The Buna-N seat provides a flexible sealing surface around the disc to support dependable bubble-tight shutoff.
Media Compatibility
Buna-N is commonly selected for water and many oil-compatible applications, but final suitability depends on the specific media, concentration, pressure, and temperature.
Ductile Iron Construction
Body Strength
The ductile iron body provides excellent mechanical strength and toughness for commercial and industrial piping systems.
Disc Durability
The ductile iron disc provides a rugged flow-control element for repeated valve operation within the manufacturer's specified service conditions.
Lug-Style Body Design
Independent Flange Bolting
The lug body allows each flange side to be bolted independently, simplifying removal and maintenance without necessarily disturbing the opposite flange.
Dead-End Service
Lug-style butterfly valves may support dead-end or end-of-line service when permitted by the manufacturer's applicable pressure rating and installation requirements.
Typical Applications
Water & Mechanical Systems
- Water distribution piping
- Mechanical utility systems
- Equipment isolation
- General fluid control
- Compatible building piping systems
Industrial Systems
- Plant utility piping
- Industrial water service
- Process support systems
- Compatible oil service
- General industrial flow control
Buna-N vs. EPDM Seat
Buna-N
Buna-N is commonly chosen where compatibility with oils and petroleum-based fluids is important, provided the specific media and operating conditions are suitable.
EPDM
EPDM is commonly selected for water, HVAC, and many general-purpose applications but is generally not recommended for petroleum oils and hydrocarbon-based fluids.
Gear Handle vs. Lever Handle
Gear Handle
A gear operator provides greater mechanical advantage and slower, more controlled movement where higher valve torque is present.
Lever Handle
A lever handle provides faster direct quarter-turn operation and is typically used where operating torque is lower.
Our valve, fitting, and industrial product specialists can help review your valve size, FIP connection requirements, pressure rating, handle configuration, media compatibility, and application before you order.
Email the GetPipe.com Team Visit Quick SupportFrequently Asked Questions
What type of valve is this?
This is a lug-style butterfly valve with a Buna-N resilient seat and manual gear operator.
What material is the valve body?
The supplied product information identifies a ductile iron body.
What material is the disc?
The supplied product information identifies a ductile iron disc.
What seat material is used?
The valve uses a resilient Buna-N, also known as NBR, seat.
How is the valve operated?
The valve uses a manual gear operator with a handwheel.
Why use a gear operator?
The gear operator provides increased mechanical advantage, reducing operating effort and allowing smoother valve positioning.
What flanges is this valve compatible with?
The supplied product information identifies compatibility with ANSI Class 125/150 flanges.
Does the valve provide bidirectional shutoff?
Yes. The supplied product information identifies bidirectional bubble-tight shutoff.
Can this valve be used for dead-end service?
The supplied product information identifies dead-end service capability. Confirm the permitted pressure rating and installation requirements for the specific valve before use.
What fluids is Buna-N commonly used with?
Buna-N is commonly used with water and many oil-compatible fluids, but compatibility should always be verified for the exact media and operating conditions.
What should I verify before ordering?
Confirm nominal valve size, flange compatibility, system pressure, operating temperature, Buna-N media compatibility, and dead-end service requirements before ordering.
Important Ordering & Installation Notes
- This listing is for Midland Lug-Style Butterfly Valves with Buna-N seats and manual gear operators.
- Confirm the required nominal valve size before ordering.
- Verify compatibility with ANSI Class 125/150 mating flanges.
- Confirm system pressure and operating temperature requirements.
- Verify Buna-N compatibility with the intended fluid before installation.
- Confirm ductile iron body and disc compatibility with the system media.
- Verify whether dead-end service is permitted at the required operating pressure.
- Ensure mating flanges and connected piping are properly aligned before tightening hardware.
- Do not use flange bolts to pull misaligned piping into position.
- Verify adequate internal clearance for complete disc rotation.
- Confirm adequate space for gear operator and handwheel operation.
- Cycle the valve after installation to confirm unobstructed movement.
- Do not exceed manufacturer pressure, temperature, or torque limitations.
- Install according to applicable piping standards, project requirements, and manufacturer recommendations.
