Novin Industrial Vibrations (Larzegir Novin) — Brand Overview
Novin Industrial Vibrations is a respected Iranian designer and manufacturer of industrial expansion joints, operating since 2004 and known by the brand “Novin.” The portfolio covers rubber expansion joints and metallic bellows assemblies in a wide range of sizes and pressure classes for oil & gas, petrochemical, power, steel, mining, water & wastewater, and HVAC. A strong focus on product engineering, compliance with international standards (EJMA, ANSI/ASME), and ISO-based management systems has made “Novin” synonymous with quality, durability, and safety.
Key Benefits & Applications of Novin Expansion Joints
- Vibration & noise reduction: Damps vibrations from pumps, compressors, and fans; prevents transmission to pipework and structures.
- Movement compensation: Handles axial, lateral, and angular movements from thermal expansion, settlement, misalignment, and pressure shocks.
- Longer equipment life: Reduces material fatigue, prevents leaks and joint failures, and lowers maintenance.
- Safety & environmental compatibility: Media/temperature-matched materials (EPDM, NBR, SBR, NR, stainless-steel alloys) for corrosive, hygienic, or high-temperature service.
- Electrical insulation (rubber models): Lowers risk of galvanic corrosion and stray current between dissimilar metals.
Novin Rubber Expansion Joints
- Small-bore series (NB-85): ~¾″ to 12″. Suited to utilities and general process lines at standard pressure/temperature. Easy installation; controlled curing quality.
- Large autoclaved sizes: ~1¼″ up to very large diameters (to ~140″). Autoclave steam-cured with internal metallic reinforcements; ideal for large-diameter/high-pressure duties in power and petrochemical service.
Standout Construction Features
Inner tube tailored to the medium; bead wire for reliable sealing; reinforcement plies to resist pressure; rotating flanges for bolt-hole alignment; option for tie rods and compression sleeves to limit extension/compression under surge or vacuum.
Color Coding of Novin Rubber Expansion Joints
Color coding speeds selection of the right model by application. Typical guidance:
| Body Color | Typical Rubber Grade | Key Application | Sample Temp Range* | Chemical Resistance | Common Media | Selection Note |
|---|---|---|---|---|---|---|
| Yellow | EPDM/SBR | HVAC, chilled water | −10°C to +110°C | Good in water/light steam | Water, dilute solutions | Cost-efficient for MEP |
| Blue | Reinforced NBR | High-pressure lines | −10°C to +90°C | Moderate in hydrocarbons | Industrial water, light oil | Check PN and tie rods |
| Green | Special EPDM/CR | Corrosive environments | −10°C to +120°C | Excellent in acids/alkalis | Chemical solutions | Select with materials consult |
| Red | EPDM/HT | High temperature | −20°C to +130°C | Good in hot water | Hot water, low-pressure steam | Verify continuous/peak temps |
| Orange | Sanitary EPDM | Drinking water | −5°C to +90°C | Excellent in water | Potable water | Meets sanitary requirements |
| Brown | NBR | Petroleum derivatives | −5°C to +90°C | Excellent in hydrocarbons | Kerosene, diesel | Reliable hydrocarbon sealing |
| Gray | SBR/EPDM | Compressed air | −10°C to +90°C | Good in air/light oil | Dry/moist air | Suitable for compressors |
* Sample ranges; final selection must follow exact project data (pressure, continuous/peak temperature, medium, duty cycle).
Core Structure & Components (Rubber Joints)
- Inner Tube: Direct media contact; material per temperature/corrosion.
- Reinforcement Plies: Fabric/yarn/metal layers for pressure resistance.
- Bead Wire: Steel rings to reinforce lips and seal.
- Flanges (Rotating): For bolt alignment and easier fit-up.
- Tie Rods & Sleeves: Restrain tension and limit compression during surges/vacuum.
Novin Metallic Bellows Expansion Joints
Metallic bellows elements absorb axial, lateral, and angular movements, remaining stable at elevated temperature and pressure. They control thermal expansion, damp vibration, and reduce anchor loads. Common alloys: SS304/316/321; Inconel for special service. Ends: flanged/welded; optional hinge or tied hardware.
Common Series
- Axial: Absorbs ΔL along straight runs.
- Axial pressure-balanced (in-line): Cancels internal pressure thrust; lowers anchor loads.
- Elbow pressure-balanced: For changes in direction; prevents thrust transfer to elbows.
- Universal lateral (hinged/tied): Dual bellows for controlled lateral travel in one plane.
- Angular (hinged/gimbal): Allows rotation about one or intersecting axes for misalignment.
Engineering Selection Checklist
Design/test pressure (PN/PS) with safety factors; temperature (continuous/peak) and effects on modulus/creep; required movements (±ΔL, ΔY, θ) and spring rates; medium & corrosion (elastomer/alloy compatibility; hygiene for potable water); dynamics (frequency/amplitude, shock, frequent starts/stops, water hammer); end connections (rotating flanges, weld, threaded; flange class & gasketing for metallic); installation limits (face-to-face, clearances, alignment, inspection access); standards & inspection (EJMA for bellows, relevant ASME/ANSI procedures, leak/hydro tests).
Basic Calculations & Quick Example
- Total required axial compensation:
ΔL_req = α × L_run × ΔT + ΔL_settlement - Internal pressure thrust:
F_pressure = P × A_effective
Engineering note: IfF_pressureis significant, use pressure-balanced designs or tie rods so loads are not transmitted to anchors.
Example: A 20 m steel line with α = 12×10⁻⁶/°C and ΔT = 80°C → ΔL_thermal = 19.2 mm. With 5 mm settlement, you need ~24–25 mm axial compensation; an axial bellows with ≥30 mm capacity is a sound choice.
Installation & Operation Guidelines
Align flange faces; tighten bolts in a star pattern to the recommended torque.
Avoid twisting the joint; set rotating flanges before final tightening.
Use tie rods/anchors/snubbers where pressure surges are possible.
On rubber models, prevent over-compression/over-extension with sleeves.
Re-torque after the first 100 hours of operation.
Maintenance, Monitoring & Periodic Inspection
Visual checklist: cracks, bulging, leaks, discoloration, loose bolts.
Condition monitoring: unusual vibration/noise, skin temperature, pressure changes.
Preventive replacement based on thermal/pressure cycles and manufacturer guidance; immediately remove any leaking or deformed joint from service.
Common Selection Pitfalls & Remedies
Ignoring combined movements; mismatched materials vs. medium; no provision for surge; installation with high misalignment—use adjustment spools and rotating flanges.
How Novin Compares in the Market
Alongside “Novin,” other local brands operate in Iran. Novin’s edge combines robust build quality, an application-oriented rubber range with color coding, a full metallic bellows portfolio, and agile engineering support. The brand is widely specified in power, petrochemical, and building services projects.
Target Projects & End-Use Industries
Oil & gas/petrochemical; power plants; steel & cement; water & wastewater/HVAC; diesel gensets & turbines (exhaust, fuel/air lines).
Quick Selection by Scenario
- Chilled-water pump, 8 bar, 80°C: Yellow rubber PN16, NB-85; optional tie rods.
- Acid line, 6 bar, 100°C: Green rubber with reinforced plies; rotating flange for precise fit.
- Low-pressure steam, 4 bar, 120°C: Red rubber or stainless bellows with suitable gasket.
- Generator exhaust: Stainless bellows with hinged/tied hardware; angular compensation.
- Kerosene, 6 bar, 60°C: Brown rubber (NBR); confirm hydrocarbon compatibility.
Rubber/Alloy Selection by Fluid & Conditions
| Fluid/Environment | Recommended Rubber/Alloy | Engineering Note | Alternative (Special Cases) |
|---|---|---|---|
| Cold/Hot water | EPDM/SBR | Good in water/light steam | Sanitary-grade EPDM for potable |
| Hydrocarbons | NBR | Compatible with oils & derivatives | FKM for higher temp/aggressive media |
| Dilute acids/bases | EPDM/CR | High chemical resistance | FKM for particularly aggressive media |
| Low-pressure steam | EPDM-HT | Control continuous/peak temp | Stainless bellows for higher temps |
| Seawater | EPDM with resistant liner | Mind chloride ions | SS316/321 for metallic joints |
| Compressed air | SBR/EPDM | Check compressor oil carryover | NBR if oil mist is present |
Sourcing via “Tamam Baha”
“Tamam Baha” is an authorized supplier of a wide range of Novin rubber and metallic expansion joints, offering technical consulting, engineering document review, custom builds, quick availability checks, test coordination, and comprehensive technical/quality documentation to keep procurement clear and aligned with client requirements.
