Built To Match Your Exact Operating Conditions
A rubber expansion joint only performs if it’s matched to your real pressure, temperature, and media — that’s why every inquiry gets reviewed by an engineer, not just a price quote.
24-Hour Reply Guaranteed
Use this space to add a short description. It gives enough info to earn a click.
On-Time Delivery, Every Order
We commit to the lead time we quote and hold to it — your project schedule stays on track.
Engineer-Reviewed For Your Conditions
A dedicated technical engineer confirms your operating conditions directly, so what we build actually fits your system.
7 Types, Custom Sizes Too
Standard configurations from DN20–DN5000, plus non-standard builds to your drawing when nothing off-the-shelf fits.
Type | Best For | Bore Range | Key Feature | |
|---|---|---|---|---|
Single Sphere | Standard vibration & noise control | DN32–DN5000 | Most economical, widest size range | |
Double Sphere | Large displacement, tight installs | DN32–DN3000 | 2x movement of single sphere | |
Clamp Type | Fast, bolt-free installation | DN25–DN1000 | No flanges, no gaskets | |
Hand-Built | Oversized or custom pipelines | DN200–DN4000+ | No mold limits, up to 25 Bar | |
90° Rubber Elbow | Compact directional routing | DN32–DN300 | Combines elbow + flexible joint | |
PTFE-Lined | Aggressive acids & chemicals | DN32–DN600 | Chemically inert, self-cleaning | |
Screwed / Threaded | Small-bore, tool-light install | DN20–DN80 | Union ends, ±45° deflection |
Don’t See an Exact Match? We Build Non-Standard Joints Too
Oversized diameters beyond DN5000, custom face-to-face lengths, special flange drilling, non-standard elastomer or PTFE liner combinations, and higher pressure ratings — our hand-built manufacturing process removes the mold-size limits that restrict standard molded joints. Send us your engineering drawing and we’ll quote a custom build.
DEVEL manufactures 7 rubber expansion joint configurations, each suited to a different connection style, movement requirement, or media condition. Not sure which fits your piping layout? Use the table above to jump straight to the right type, or send us your pipe size, pressure, and media — our engineers will recommend a model at no cost.
Single Sphere Rubber Expansion Joint — Rubber Flexible Joint
Flanged · standard vibration & noise isolation
Bore: DN32–DN5000 · Flanged (ANSI/DIN/BS/JIS/EN1092)
The most economical flexible connector for fluid piping, absorbing axial, lateral, and angular displacement while suppressing 15–25 dB(A) of structure-borne noise. Widest bore range in the product line, with a 3:1 burst-to-working-pressure safety factor and 15–20 year service life.
Typical Industries
HVAC systems
Water & wastewater
Marine & offshore
Power generation
Specifications
Working pressure | PN10 / PN16 / PN25 · Class 150 / 300 |
Elastomer | EPDM, NBR, Neoprene, Natural Rubber, SBR |
Operating temperature | -15°C to +115°C |
Safety factor | ≥ 3:1 (burst vs. working pressure) |
Double Sphere Rubber Expansion Joint
Flanged · 2x displacement of single sphere
Bore: DN32–DN3000 · Flanged (ANSI/DIN/BS/JIS/EN1092)
Dual-convolution design delivers roughly double the axial, lateral, and angular movement of an equivalent single sphere joint — up to ±85 mm axial and 75 mm lateral offset. Full vacuum rated to 700 mmHg. Fewer joints per pipeline run means fewer potential leak points.
Typical Industries
Water treatment infrastructure
Heavy industrial pumping
District HVAC loops
Chemical transport
Specifications
Working pressure | PN10 / PN16 · Class 150 |
Elastomer | EPDM, NBR, Neoprene, Natural Rubber, SBR |
Operating temperature | -15°C to +115°C |
Vacuum rating | Up to 700 mmHg (full vacuum capable) |
Clamp Type Rubber Expansion Joint
Bolt-free · fast, low-pressure installation
Bore: DN25–DN1000 · Slip-on stainless steel clamp
Substitutes heavy steel flanges with SS304/316 clamp bands — no bolts, gaskets, or torque wrenches. Reduces installation time by up to 70% and delivers 40–60% lower installed cost versus flanged joints. Compatible with steel, PVC/CPVC, FRP, and ductile iron pipe.
Typical Industries
Low-pressure civil piping
Pump inlets
Industrial drainage
HVAC building services
Specifications
Working pressure | PN ≤ 0.4 MPa |
Elastomer | EPDM, NBR, high-temp silicone available |
Clamp material | Stainless steel 304 / 316 |
Face-to-face length | As low as 150 mm (DN25–DN1000) |
Hand-built Rubber Expansion Joint
Non-molded · custom sizes & face-to-face lengths
Bore: DN200–DN4000+ · Unlimited custom sizing
Manually wrapped layer-by-layer by skilled technicians rather than molded — removes fixed die-size limits, eliminates molding stress, and typically delivers 2–3x the service life of equivalent molded units. Built for oversized diameters and pressures up to 25 Bar.
Typical Industries
Power generation cooling
Seawater desalination
Municipal utilities
Mining & heavy chemical
Specifications
Working pressure | Up to 25 Bar (custom higher on request) |
Elastomer | EPDM, NBR, Neoprene, Butyl, FKM, Hypalon |
Operating temperature | -15°C to +115°C |
Vacuum rating | Full vacuum, steel reinforcing rings |
KWT 90° Rubber Elbow / 90-Degree Rubber Bend
Molded · directional change + flexibility in one part
Bore: DN32–DN300 · Loose rotatable flanges
One-piece molded, vulcanized construction that combines a 90° directional pipe routing change with full multi-axis displacement compensation (X/Y/Z) — eliminating the need for a separate rigid elbow plus flexible joint. Zero-maintenance design with 10+ year service life.
Typical Industries
HVAC compact routing
Pump connections
Power generation
Marine & shipbuilding
Specifications
Working pressure | PN10 / PN16 / PN25 |
Elastomer | NR, EPDM, NBR, Neoprene, FKM |
Operating temperature | -30°C to +100°C (special compounds) |
Vacuum rating | 53.3–100 kPa depending on pressure class |
Rubber Lined Rubber Expansion Joint
Chemically inert · aggressive acids & slurries
Bore: DN32–DN600 · GB/T 26121 compliant
A seamless virgin PTFE (F4) or FEP (F46) interior liner is bonded to an EPDM/NBR rubber shell, providing near-total chemical inertness against concentrated acids, caustics, and solvents. The self-cleaning, non-stick surface resists scaling and crystallization — ideal for high-purity or corrosive process lines.
Typical Industries
Chemical & acid pickling lines
FGD desulfurization
Semiconductor
Pharmaceutical / FDA
Specifications
Lining | Virgin PTFE (F4), FEP (F46), FDA-grade available |
Working pressure | PN10 / PN16 · Class 150 |
Operating temperature | -30°C to +150°C |
Standards | GB/T 26121, HG/T 20592, AWWA C219, ISO 9001 |
Screwed / Threaded Rubber Expansion Joint
Union ends · small-bore, tool-light install
Bore: DN20–DN80 · BSP / BSPT / NPT union ends
Forged cast iron union-type threaded ends allow hand-tight installation in under 5 minutes — no flange bolting or torque wrenching. Multi-sphere bellows absorbs axial, lateral, and up to ±45° angular deflection in one compact unit, ideal for confined small-bore piping.
Typical Industries
Building HVAC & plumbing
Water supply pump stations
Marine & shipboard
Chemical & industrial process
Specifications
Working pressure | 1.0 MPa (burst 3.0 MPa, 3:1 safety factor) |
Elastomer | NR, NBR, EPDM |
Operating temperature | -15°C to +115°C (special: -30°C to +250°C) |
Angular deflection | ±45° combined |
Why buyers choose DEVEL
Shangjie District, Zhengzhou, Henan
ISO 9001 Quality System | ASME / DIN / JIS Compliant | GB/T National Standards | 30+ Countries Served |
Factory-direct manufacturer
Henan Devel Fluid Equipment Co., Ltd. manufactures rubber expansion joints and fluid control solutions across a DN32–DN5000 range, ASME/DIN/JIS compliant, serving 30+ countries worldwide.
7 configurations, one supplier
No need to juggle multiple vendors — flanged, clamp, hand-built, elbow, PTFE-lined, and threaded types all come from the same factory, tested to the same quality standard.
Talk to us directly
WhatsApp / Phone: +86 181 3717 1953
Email: info@develfluid.com
Office Hours: Mon–Fri, 8:00 a.m.–5:00 p.m. (UTC+8)