Industrial Valve Bushings
& Stem Bearings
Engineered for critical flow control applications, JBM supplies high-performance valve bushings to leading valve manufacturers worldwide. Unlike standard commodity parts, our bushings are designed to withstand the high pressures, extreme temperatures, and corrosive media found in Oil & Gas, Chemical Processing, and Power Generation. Whether you need low-torque PTFE for actuation efficiency or solid bronze for extreme loads, we offer solutions that meet API 6D, API 609, and AWWA standards.
Two Core Materials — One Goal: Zero Maintenance
Valve bushings fail for two reasons: corrosion and seizure. We address both with two purpose-built material families.
Steel-Backed PTFE Composite
The Corrosion Killer
Best For:
Butterfly Valves, Ball Valves, Control Valves in offshore or corrosive environments
Solid Bronze with Graphite Plugs
The High-Temperature Beast
Best For:
Gate Valves, Globe Valves, Steam Valves, and Fire-Safe designs
Bushing Selection by Valve Type
Each valve design imposes different demands on its bearings. Here's how our materials map to each application.
Butterfly Valves
High Performance · Triple Offset- Upper & lower stem bearings (trunnion bushings)
- Thrust washers for disc positioning
- Seat ring support bearings
Ball Valves
Trunnion Mounted · Floating- Trunnion support bearings (high load capacity)
- Stem guide bushings
- Seat support rings
Gate & Globe Valves
Wedge · Knife Gate · Globe- Stem nut bushings & bonnet guides
- Yoke sleeve bearings
- Backseat bushings (fire-safe)
Control Valves
Linear Motion · Rotary- Guide bushings for precision movement & zero hysteresis
- Packing box spacer rings
- Actuator linkage bearings
PTFE Composite vs. Solid Bronze — Engineering Data
Select the right material family based on your valve's operating conditions.
| Feature | Steel-Backed PTFE Composite | Solid Bronze (Cast / Machined) |
|---|---|---|
| JBM Model | JBM-50 / JBM-50HP / JBM-80 | JBM-650 / JBM-650GT |
| Structure | Steel + Sintered Bronze + PTFE Sliding Layer | Cast Bronze (C86300/C95400) + Graphite Plugs |
| Backing Options | Low-Carbon Steel or 316/316L Stainless | Solid cast body (no backing needed) |
| Lubrication | Self-Lubricating (Dry Running) | Self-Lubricating (Graphite) or Oil/Grease |
| Max. Load (Static) | 250 N/mm² | 100 – 150 N/mm² |
| Friction Coefficient | 0.03 – 0.20 (Low Torque) | 0.04 – 0.20 |
| Max. Temperature | -195 °C to +280 °C | -200 °C to +400 °C (Graphite SL1: +600 °C) |
| Max. PV (Dry) | 1.8 N/mm²·m/s (3.6 short-term) | 1.65 N/mm²·m/s |
| Corrosion Resistance | Excellent (with 316L backing — seawater, acid, H₂S) | Good (alloy dependent) |
| Fire Safety | Limited (polymer melts above 280 °C) | Excellent (metallic — no ignition risk) |
| Main Valve Application | Actuated Butterfly & Ball Valves | Manual / Heavy-Duty Gate & Globe Valves |
Not Sure Which Material?
Send us your valve type, stem diameter, pressure class, and media — we'll recommend the right bushing within 24 hours.
Why Valve OEMs & Repair Shops Choose JBM
Custom Dimensions
Machined to your exact stem diameter — metric or imperial. We work from your drawing or OEM part number to deliver a perfect fit.
Low Breakaway Torque
Our PTFE liner technology ensures your valve opens smoothly after long periods of inactivity. Critical for emergency shutdown valves and intermittent-duty control valves.
Fast Delivery
Standard rod stock (PTFE composite & bronze) available for rapid machining of custom sizes. Most orders ship within 2–3 weeks — not 8–12.
Standards Compliance
Our valve bushings support API 6D, API 609, API 600, AWWA C504/C507, and BS 6755 fire-safe requirements. 316L backing available for NACE MR0175 compliance.
Valve Bushing Applications by Industry
Oil & Gas
- Subsea ball valve trunnion bearings
- Pipeline isolation valve stems
- Christmas tree valve bushings
- Wellhead choke valve guides
Chemical & Petrochemical
- Acid service butterfly valve bushings
- Chlor-alkali plant valve stems
- Reactor feed valve guides
- Corrosion-resistant control valves
Power Generation
- Main steam valve stem bushings
- Feedwater control valve guides
- Turbine bypass valve bearings
- Desuperheater valve bushings
Water & Wastewater
- Large butterfly valve stem bearings
- Sluice gate valve bushings
- Check valve hinge pin bushings
- AWWA-rated valve components
We Supply Valve OEMs & Repair Shops Worldwide
From prototype runs for new valve designs to bulk orders for serial production — and single-piece MRO replacements for emergency repairs. No minimum order quantity.
Valve-Grade Bearing Products
Get a Quote for Your Valve Project
Designing a new valve or replacing worn stem bushings? Send us your drawing or dimensions (ID × OD × Length). We support OEMs and valve repair shops worldwide.
Request a Quote