Tapered Bore Ring Spacer: Thermoplastic Butterfly Valve Clearance for Lined Pipe Systems
A Tapered Bore Ring Spacer, also commonly referred to as a beveled bore ring spacer or butterfly valve relief spacer, is a precision-machined thermoplastic flange spacer designed with a tapered inner diameter. This beveled bore accommodates butterfly valve discs, allowing smooth valve operation without interference while maintaining proper flange spacing.
Overview
SG-P manufactures Tapered Bore Ring Spacers specifically for lined-pipe systems. Each spacer is engineered to ensure correct valve clearance, consistent flow performance, and long-term reliability in corrosive and non-metallic piping environments.
What Is a Tapered Bore Ring Spacer Used For?
Tapered Bore Ring Spacers are used in piping systems where butterfly valves are installed between flanges. The tapered inner bore prevents disc interference during valve operation while preserving proper alignment and spacing.
Typical uses include:
- Providing clearance for butterfly valve discs
- Preventing valve interference or binding
- Maintaining proper flange spacing in lined-pipe systems
- Supporting smooth valve actuation and flow control
- Retrofitting existing systems with butterfly valves
Applications and Industries
- Chemical & Petrochemical Processing: corrosion-resistant valve spacing solutions
- Water & Wastewater Treatment: butterfly valve clearance applications
- Power Generation & Utilities: valve retrofit and maintenance projects
- Marine & Offshore Systems: durable spacing in harsh environments
- Industrial Process Piping: reliable valve-relief spacing components
Thermoplastic Material Options
All Tapered Bore Ring Spacers are available in premium engineering plastics selected for chemical compatibility and durability:
- Polypropylene (PP): Lightweight, economical, and resistant to many acids and alkalis
- PTFE (Teflon®): Exceptional chemical resistance and temperature performance
- PVDF (Kynar®): Flame-resistant, UV-stable, and highly durable for harsh environments
SG-P specifications are based on lined-pipe dimensions. Full-face tapered bore spacers are also available, and any spacer can be custom-machined to meet specific valve, thickness, or application requirements.
Design Features
- Tapered (beveled) inner bore for butterfly valve clearance
- Precision-machined for lined-pipe flange dimensions
- Flow-through ring design allowing uninterrupted process flow
- Non-conductive and corrosion-resistant materials
- Smooth sealing faces for optimal gasket contact
- Compatible with Class 125 and 150 flange systems
Why Choose SG-P Tapered Bore Ring Spacers?
- Over 50 years of custom thermoplastic fabrication expertise
- In-house machining ensures tight tolerances and valve compatibility
- Fast turnaround for standard and custom valve spacers
- Proven performance in corrosive and non-metallic piping systems
- Complete line of thermoplastic spacers including Ring, Full Face, Blind, Orifice, Reducing, and Tapered Bore designs
Request a Quote or Custom Configuration
Need a Tapered Bore Ring Spacer built for your butterfly valve application? SG-P offers made-to-order spacers—also known as beveled bore or butterfly valve relief spacers— in various materials, sizes, and thicknesses to match your lined-pipe system requirements.
Request a Quote