Custom Fabrication for Industrial Valve Parts

Since 1918, our US-based facility has specialized in the manufacturing of industrial valves and components. We offer custom fabrication services for industrial valve parts, leveraging our extensive experience to deliver precise, high-quality solutions. No matter how demanding your application, we can provide the parts you need for optimal performance and durability.

Our shop is fully equipped with the technology and team needed to produce and/or install critical parts for your industrial valves. We have:

• Axis Vertical Turning Center 
• CNC Horizontal Lathes
• Conventional Lathes
• Milling Machines
• Large Drill Presses
• Welding Station

From brand new valve designs count on Williams Valve to take care of it all. We are your experienced resource for all things industrial and commercial valve.

Standard Components by Valve Type

Understanding the specific parts that constitute each valve design helps you know what may require maintenance down the road, or modification services to optimize performance within your system. This knowledge can help you choose the right valve for your needs from the start.

Parts common to many valves include:

• Body: The main pressure-retaining shell of the valve. It houses all internal components and connects directly to the pipe.
• Bonnet: A pressure-retaining cover attached to the top of the body. It encloses and protects the stem and the valve mechanism, allowing access for maintenance.
• Seats (Seat Rings): These are the sealing surfaces within the valve body that the mechanism (gate, ball, etc.) presses against to create a leak-tight seal when the valve is closed. They can be integral to the body or replaceable rings.
• Stem: The shaft that connects the actuator (handwheel, gear operator, etc.), transferring motion to open or close the valve.
• Rising Stem: The stem moves up and down visibly outside the valve as it’s operated, indicating the valve’s position.
• Non-Rising Stem: The stem rotates to move the gate up and down within the bonnet, but it does not extend outside the valve, making it suitable for confined spaces.
• Stem Packing: A sealing material (e.g., braided graphite, PTFE) that surrounds the stem to prevent leakage along the stem’s axis while allowing the stem to move. 
• Gland: A component that compresses the stem packing to create a seal.
• Gland Flange: A flange that secures the gland.
• Yoke: A structure that supports the stem and connects the actuator to the bonnet (especially in rising stem designs).
• Yoke Sleeve/Stem Nut: The component within the yoke that the stem threads into, allowing for linear movement.
• Handwheel/Actuator: The mechanism used to operate the valve (manual handwheel, gear operator, electric actuator, pneumatic actuator, etc.).
• Gaskets: Seals used at various pressure-retaining joints, such as between the body and the bonnet.
• Bolting (Stud Bolts, Nuts): Used to secure bolted bonnets and other flanged connections.
• Backseat: A secondary seal between the stem and bonnet, allowing for stem packing replacement while the valve is under pressure (when the valve is fully open).
• Drain/Vent Plugs: For draining or venting the body cavity.
• Grease Fittings/Sealant Injectors: For lubrication or emergency sealing, especially in slab and expanding gate designs.

Gate Valve Parts

• Gate (Disc/Wedge/Obturator): This is the closure element that moves to block or allow fluid flow. Its design varies significantly by valve type:
• Standard Wedge Gate: A solid, flexible, or split wedge-shaped disc that sits or rises from two inclined seats.
• Slab Gate: A single, flat, solid disc (or sometimes a two-piece disc) that moves between two parallel seats. These are often “through-conduit” designs, meaning they offer a full, unobstructed bore when open.
• Expanding Gate: A two-piece obturator (gate and segment) that expands mechanically against the upstream and downstream seats when closed, creating a tight seal.

Globe Valve Parts

The internal design of the body is what differentiates the different types of globe valves.

• T-Pattern: The most common design, this has a Z-shaped internal flow path where the fluid changes direction twice, causing a higher pressure drop. 
• Angle Pattern Body: The inlet and outlet ports are at a 90-degree angle to each other, allowing the valve to function as both a valve and an elbow. This design reduces pressure drop compared to the T-pattern.
• Y-Pattern Body: The stem and seat are angled at approximately 45 degrees to the flow path, creating a straighter flow path and minimizing pressure drop. This design is often used for high-pressure and high-temperature applications or for slurries to reduce erosion and clogging.

Disc (Plug/Obturator): This is the movable closure element that moves perpendicular to the flow path to regulate or block fluid flow. Globe valve discs come in various designs to suit different throttling needs:

• Ball Disc: Used primarily for on-off service in low-pressure and low-temperature applications.
• Composition Disc: Features a non-metallic insert ring on the disc and provides a tighter shut-off.
• Plug Disc: Has a long, tapered shape and works well for throttling.

Check Valve Parts

• Disc (Clapper): This is the movable element that swings on a hinge to allow forward flow and closes against the seat to prevent reverse flow. Its design is specific to the swing check valve.
• Hinge Pin: A shaft that connects the disc to the hinge arm (or directly to the body in some designs), allowing the disc to pivot or swing.
• Hinge Arm: The component that connects the disc to the hinge pin, enabling its swinging motion.

Ball Valve Parts

Body designs can vary between one, two, and three piece for ball valves.

• One-piece: Simplest and most economical, but usually non-repairable.
• Two-piece: Consists of two pieces bolted or threaded together, allowing for ball and seat access.
• Three-piece: Features a main body and two end caps, allowing the central section to be removed for maintenance without taking the entire valve out of the line.

Ball (Rotary Ball/Obturator): The spherical closure element with a bore (hole) through its center. When the bore is aligned with the pipeline, the valve is open; when rotated 90 degrees, the solid part of the ball blocks the flow, closing the valve. Bore types include full bore (full port), reduced bore (standard port), and V-port (for throttling).

Ball Designs: Floating ball (supported by the seats) or Trunnion-mounted ball (supported by additional shafts at the top and bottom for larger, higher-pressure applications).

Common Modification Requirements for Industrial Valves

Industrial valve modifications go beyond standard configurations to meet unique challenges related to your operations. This generally involves swapping out standard parts for specialized ones that improve your valve’s performance as related to extreme temperatures, corrosive media, specialized actuation, fugitive emissions control, or flow precision 

Seats and Seals

Seats and seals are critical for a valve’s ability to stop flow completely and prevent leaks. Modifications often involve changing the material of these components. For example, in high-temperature applications, standard PTFE seats might be replaced with PEEK or metal seats. For corrosive chemicals, specialized polymers like UHMWPE or even unique metal alloys might be necessary.

O-Rings and Gaskets

O-rings and gaskets provide static sealing at various joints within the valve, such as between the body and bonnet, or body sections. Modifying these components is crucial to prevent external leakage, maintain pressure integrity, and ensure the valve’s longevity in demanding environments. For instance, standard NBR O-rings are unsuitable for high temperatures or aggressive chemicals; instead, Viton, Kalrez, or graphite gaskets might be used. These material changes 

Trim Changes

Trim refers to the internal wetted parts of a valve that are in contact with the flowing medium. For gate, globe, and check valves, this primarily includes the stem, disc/gate, and seat surfaces. Modifications to trim often involve changing the material of these components to resist corrosion, erosion, or cavitation caused by the fluid. For example, standard carbon steel trim might be upgraded to stainless steel, Monel, or Hastelloy for corrosive services. 

Actuation Accessories and Modifications for Valves

Actuation accessories and modifications help your valves work better or differently, including the ability to be controlled remotely or to open and close in a very specific way. Actuation parts supply and installation we provide include:

• Electric Motor Operators
• TFE (Soft Seat) – Block & Bleed 
• Swing Check Valves with Lever & Spring
• Pneumatic Operators Bosses & Drain Tappings or Weight
• Air Motor Operators
• Floorstands for Handwheel Extensions
• Optional Gasket Materials
• Cylinder Operators
• Optional Packing Materials: Spiral Wound Graphoil

OEM-Equivalent Valve Parts Supply

When you need replacement parts, you can trust our expertise in manufacturing OEM-equivalent valve components. Our quality assurance process ensures that every part we produce meets the highest standards and will fit and perform just like the original. At Williams Valve, our commitment to precision and quality assurance means you get reliable parts that continue to perform properly over time.

Experts in the Valve Industry for Over 100 Years

With over a century of experience, our team is an industry leader in valve parts manufacturing and modification. Count on our team at Williams Valve for all your critical industrial valve parts.