Merit Brass

Stainless Press Three Piece Ball Valve

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SKU:
MBF31
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Description

Stainless Press Three Piece Ball Valve

Merit Stainless Press Three Piece Ball Valves provide quarter-turn shutoff within compatible stainless steel press piping systems. The three-piece valve body is designed for serviceability, while integral press ends allow direct connection to IPS Schedule 5 or Schedule 10 stainless steel pipe without threaded or welded pipe joints.

This valve is identified as Buy American Act compliant, designed for IPS (Iron Pipe Size) Schedule 5 or Schedule 10 stainless steel pipe, rated for a maximum working pressure of 300 PSI, and backed by a 50-Year Limited Warranty.

Product Highlights

  • Stainless steel three-piece ball valve
  • Integral stainless press connections
  • Quarter-turn shutoff operation
  • Three-piece valve body construction
  • Designed for IPS stainless steel pipe
  • Compatible with Schedule 5 stainless steel pipe
  • Compatible with Schedule 10 stainless steel pipe
  • 300 PSI maximum working pressure
  • 50-Year Limited Warranty
  • Buy American Act compliant
  • Press connections simplify installation in compatible piping systems
  • Manufacturer catalog, approvals, tooling, dimensional, and compatibility documentation available below

Technical Specifications

Product Type Three Piece Ball Valve
Material Stainless Steel
Valve Design Three Piece
Connection Type Press
Pipe Sizing IPS - Iron Pipe Size
Compatible Pipe Schedule Schedule 5 or Schedule 10
Maximum Working Pressure 300 PSI
Operation Quarter-Turn Ball Valve
Compliance Buy American Act
Warranty 50-Year Limited Warranty
Primary Function On/Off Flow Control in Compatible Stainless Steel Press Piping Systems

Three-Piece Ball Valve Design

A three-piece ball valve uses a multi-piece body surrounding the internal ball and seat assembly. This construction is commonly selected where system design benefits from a serviceable valve body configuration.

Quarter-turn operation allows the valve to move between open and closed positions with a 90-degree handle rotation, providing straightforward isolation of the connected piping system.

The integral press ends allow the valve to connect directly to compatible IPS Schedule 5 or Schedule 10 stainless steel pipe using appropriate press tooling.

Why Choose a Stainless Press Ball Valve?

Quarter-Turn Shutoff

  • Designed for on/off flow control
  • 90-degree operating motion
  • Simple visual indication of valve position
  • Suitable for system isolation
  • Common choice for mechanical and process piping

Integral Press Connections

  • Connects directly to compatible stainless steel pipe
  • No threaded pipe joint required at the valve ends
  • No valve-end welding required
  • Uses compatible press tooling
  • Supports mechanical installation in stainless press systems

Three-Piece vs. One-Piece or Two-Piece Ball Valves

Three-Piece Ball Valve

  • Three-piece body construction
  • Designed with serviceability in mind
  • Common in industrial and mechanical piping
  • Integral press ends on this valve
  • This product configuration

One-Piece / Two-Piece Ball Valves

  • Use fewer major body sections
  • May have different maintenance characteristics
  • Available in various threaded, welded, or press configurations
  • Selection depends on system requirements
  • Different body construction from this valve

Compatible Piping

Schedule 5 Stainless Steel Pipe

  • Compatible pipe schedule identified by Merit
  • IPS sizing
  • Verify exact outside diameter before installation
  • Confirm pipe condition before pressing
  • Use compatible Merit Stainless Press tooling

Schedule 10 Stainless Steel Pipe

  • Compatible pipe schedule identified by Merit
  • IPS sizing
  • Verify exact outside diameter before installation
  • Confirm pipe condition before pressing
  • Use compatible Merit Stainless Press tooling

Pressure Rating

The supplied product information identifies this Stainless Press Three Piece Ball Valve with a 300 PSI maximum working pressure.

Final system suitability should also consider valve size, operating temperature, conveyed media, pipe material, seal compatibility, installation method, and applicable Merit technical documentation.

Buy American Act Compliance

This product is identified by Merit as being in compliance with the Buy American Act.

For projects with domestic-content or procurement requirements, review the applicable manufacturer documentation and project specifications to confirm that this valve meets the specific requirements of the installation.

50-Year Limited Warranty

The supplied product information identifies this valve as carrying a 50-Year Limited Warranty.

Warranty coverage is subject to the manufacturer's terms, conditions, installation requirements, application limitations, and other applicable provisions.

Common Applications

Commercial & Mechanical Piping

  • System isolation
  • Equipment shutoff
  • Mechanical piping systems
  • Utility piping
  • Stainless steel press installations

Industrial & Process Service

  • Process piping systems
  • Equipment isolation
  • Compatible liquid-service applications
  • Maintenance shutoff points
  • Applications requiring press-connected ball valves

Installation & Selection Guidance

  • Confirm the required nominal valve size before ordering.
  • Verify that the connected pipe uses IPS sizing.
  • Use compatible Schedule 5 or Schedule 10 stainless steel pipe.
  • Verify pipe outside diameter and condition before installation.
  • Inspect and properly prepare both pipe ends before pressing.
  • Insert pipe to the required depth before completing the press connection.
  • Use compatible press tooling approved for the Merit Stainless Press system.
  • Follow manufacturer tooling and pressing instructions.
  • Confirm valve orientation and handle clearance before pressing both ends.
  • Provide sufficient clearance for full handle operation.
  • Do not use the valve to pull misaligned piping into position.
  • Support connected piping to avoid excessive mechanical load on the valve.
  • Confirm media compatibility using the Merit Stainless Press Chemical Compatibility Chart.
  • Verify that the 300 PSI maximum working pressure is appropriate for the intended application.
  • Review approvals, catalog information, and project requirements before installation.

Product Documents

Press Fittings & Valves Catalog

Review manufacturer information for Merit press fittings and valve products, including available configurations and technical information.

View Press Fittings & Valves Catalog

Merit Stainless Press Approvals

Review applicable approvals and certifications for the Merit Stainless Press system.

View Stainless Press Approvals

Merit Stainless Press Benefits & Features

Review manufacturer information covering key benefits and features of the Stainless Press system.

View Benefits & Features

Merit Stainless Press Dimensional Catalog

Review dimensional information, available sizes, and related Stainless Press product configurations.

View Dimensional Catalog

Merit Stainless Press Chemical Compatibility Chart

Review chemical compatibility information before selecting the valve for the intended system media.

View Chemical Compatibility Chart

Merit Stainless Press FAQs

Review manufacturer answers to frequently asked questions about the Merit Stainless Press system.

View Stainless Press FAQs

Merit Stainless Press Handout

Review the manufacturer overview of the Stainless Press product line and system features.

View Stainless Press Handout

Merit Stainless Press Linecard

Review the available Merit Stainless Press product offering.

View Stainless Press Linecard

Merit Stainless Press Submittals

Review technical submittal information for the Merit Stainless Press system.

View Stainless Press Submittals

Merit Stainless Press Tooling

Review compatible tooling information and pressing requirements before installation.

View Stainless Press Tooling

Pipe Chart: Common Diameters & Wall Thicknesses

Reference common pipe diameters and wall thicknesses when reviewing Schedule 5 and Schedule 10 stainless steel pipe.

View Pipe Chart

Need Help Selecting a Stainless Press Three Piece Ball Valve?

Our industrial PVF specialists can help review your valve size, pipe schedule, pressure requirements, media compatibility, project compliance requirements, and press tooling before you order.

Frequently Asked Questions

What is a stainless press three piece ball valve used for?

It is used for quarter-turn on/off flow control and isolation within compatible stainless steel press piping systems.

What pipe schedules are compatible?

The supplied product information identifies IPS Schedule 5 and Schedule 10 stainless steel pipe.

What does IPS mean?

IPS stands for Iron Pipe Size and refers to the nominal pipe sizing system used for the compatible Schedule 5 and Schedule 10 stainless steel pipe.

What is the maximum working pressure?

The supplied product information identifies a maximum working pressure of 300 PSI.

What does three-piece mean?

Three-piece refers to the valve body construction, which is assembled from three major body sections around the internal ball and seat assembly.

Does this valve use press connections?

Yes. The valve is designed with integral press connections for compatible stainless steel pipe.

Does installation require welding?

The press-end connections do not require welding. They are mechanically pressed onto compatible pipe using the appropriate tooling.

Is this valve Buy American Act compliant?

Yes. The supplied product information identifies this valve as being in compliance with the Buy American Act.

What warranty is provided?

The supplied product information identifies a 50-Year Limited Warranty. Refer to the manufacturer's warranty terms for conditions and limitations.

Where can I verify available valve sizes?

Use the Press Fittings & Valves Catalog and Merit Stainless Press Dimensional Catalog in the Product Documents section above.

Where can I check chemical compatibility?

Use the Merit Stainless Press Chemical Compatibility Chart in the Product Documents section above.

Where can I find compatible press tooling?

Use the Merit Stainless Press Tooling document in the Product Documents section above.

Important Ordering Notes

  • Product is a stainless press three-piece ball valve.
  • Integral press connections are designed for compatible IPS stainless steel pipe.
  • Compatible pipe schedules identified as Schedule 5 and Schedule 10.
  • Maximum working pressure is 300 PSI.
  • Product is identified as Buy American Act compliant.
  • Product is identified with a 50-Year Limited Warranty.
  • Confirm nominal valve size before ordering.
  • Verify pipe schedule, outside diameter, and condition before installation.
  • Provide adequate clearance for valve handle operation.
  • Confirm pressure, temperature, and media compatibility before use.
  • Confirm media compatibility using the manufacturer chemical compatibility chart.
  • Use compatible Merit Stainless Press tooling.
  • Review the Press Fittings & Valves Catalog, approvals, dimensional information, tooling requirements, and submittals before installation.
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