valaePrecision Valve

2 month ago

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Shanxi Bote Fluid Pipeline Technology Co., Ltd.

3 month

Product details

Flexible Rubber Joint for Valve Systems

Product Overview

Flexible Rubber Joint for Valve Systems produced by Shanxi Bote is widely deployed in fire protection, water supply & drainage, HVAC pump room pipeline systems. Covering standard sizes from DN50 to DN300, this rubber connector adopts multi-layer high-strength polyamide cord fabric as reinforcing structure, with premium anti-aging natural rubber for inner and outer layers, and built-in steel wire reinforcement rings for structural stability.

The matched flanges are made of ductile iron with hot-dip galvanized anti-corrosion surface treatment, with a nominal pressure resistance of 1.6MPa. This flexible joint is commonly installed at inlet and outlet of fire pump units, water supply and drainage pipelines, as well as central air conditioning circulation pipes. It delivers shock absorption, noise reduction, displacement compensation and anti-tearing protection performance, and can perfectly coordinate with Industrial Valve, Ball Valve, Gate Valve, Globe Valve, Butterfly Valve and Check Valve in complete pipeline networks.

It is a standard supporting fitting for commercial buildings, factory workshops, residential communities, municipal pipe networks and various large-scale engineering construction projects.

Technical Specifications

Product Name: Flexible Rubber Joint for Valve Systems
Applicable Size Range: DN50 - DN300
Inner & Outer Material: High quality anti-aging natural rubber
Reinforcing Layer: Multi-layer high-strength polyamide cord fabric + built-in steel wire ring
Flange Material: Ductile iron with hot-dip galvanized coating
Nominal Working Pressure: 1.6MPa
Core Functions: Vibration damping, noise reduction, displacement compensation, anti-tearing protection
Matching Equipment: All types of Industrial Valve including Ball Valve, Gate Valve, Globe Valve, Butterfly Valve, Check Valve
Main Application Pipeline: Fire protection, water supply drainage, HVAC circulation pump room pipes

Product Features & Advantages

1. Multi-layer Reinforced Structure for High Durability

Polyamide cord fabric and built-in steel wire rings greatly boost tensile and pressure resistance, effectively preventing swelling and cracking under long-term fluid pressure when matched with any Industrial Valve, Ball Valve, Gate Valve, Globe Valve, Butterfly Valve and Check Valve.

2. Anti-aging Natural Rubber Inner & Outer Layer

Premium natural rubber material resists oxidation, water and mild medium corrosion, extending service life in humid pump room and municipal pipeline environments without rapid aging hardening.

3. Galvanized Ductile Iron Flange with Strong Anti-corrosion

Ductile iron flanges processed by hot-dip galvanizing avoid rust and corrosion at connection points, guaranteeing stable sealing when connecting pipes and various valve products.

4. Excellent Shock Absorption & Noise Reduction Effect

Elastic rubber structure absorbs mechanical vibration transmitted from pump units and valves, cutting pipeline resonance noise and protecting the whole set of Industrial Valve equipment from vibration damage.

5. Multi-direction Displacement Compensation Function

The flexible body absorbs axial, radial and angular displacement caused by pipeline thermal expansion, foundation settlement and installation errors, avoiding pipe breakage and valve deformation beside Ball Valve, Gate Valve, Globe Valve, Butterfly Valve, Check Valve.

6. Complete Size Range for All Engineering Demands

Full DN50-DN300 specifications are in stock, covering small residential water pipes to large municipal and fire main pipelines, fully matching all mainstream valve types for integrated pipeline construction.

Step-by-Step Installation Guide

Clean the flange surfaces of the pipeline and matched Industrial Valve (Ball Valve, Gate Valve, Globe Valve, Butterfly Valve or Check Valve) to remove rust, sediment and debris.
Place the flexible rubber joint between the two flange ends, align the bolt holes evenly to avoid forced torsion of the rubber body.
Penetrate bolts and fasten nuts diagonally in turns to ensure uniform compression without local excessive squeezing of rubber.
Confirm the joint has no distortion or extrusion deformation after all bolts are tightened completely.
Carry out pipeline pressure test at 1.6MPa rated pressure to check for water leakage at flange connection positions.
Regularly inspect the rubber surface for aging, cracking or bolt loosening during long-term operation of valve and pump systems.

Application Scenarios

Fire Protection Pump Rooms

Installed on inlet and outlet of fire pumps, matched with supporting Butterfly Valve, Check Valve and Globe Valve to reduce vibration of fire pipeline networks.

Water Supply & Drainage Pipeline

Used for residential and commercial water pipes, coordinating with Ball Valve and Gate Valve to compensate pipeline displacement and eliminate water hammer noise.

Central Air Conditioning Circulation System

Connect chilled water and hot water circulation pumps, isolate vibration transmission to building walls and floors effectively.

Commercial Building Mechanical Equipment

Support all types of Industrial Valve sets in shopping malls, office buildings and hotels for stable silent pipeline operation.

Factory Workshop Process Pipes

Adapt to workshop circulating water and cooling pipelines, protecting Ball Valve, Gate Valve and other valve products from vibration damage.

Municipal Water & Sewage Pipe Networks

Absorb foundation settlement displacement of municipal pipes, cooperating with Check Valve and Globe Valve for long-term underground stable operation.

Core Benefits for Buyers

Extend valve service life: Vibration isolation avoids long-term resonance damage to Industrial Valve, Ball Valve, Gate Valve, Globe Valve, Butterfly Valve and Check Valve, lowering equipment replacement frequency.
Reduce construction maintenance cost: Displacement compensation prevents pipeline cracking caused by thermal expansion and foundation shift, cutting post-construction repair expenses.
Improve building comfort: Effective noise reduction eliminates pump and pipeline vibration noise transmitted to indoor spaces, ideal for residential and commercial real estate projects.
Wide compatibility with all valve types: Standard DN50-DN300 flange size matches all mainstream industrial valve products without customized adapters.
Strong anti-corrosion performance: Galvanized flange and anti-aging rubber adapt to indoor pump rooms and humid underground municipal pipe environments.
One-stop supporting solution: Matched complete sets with all valve series, convenient for engineering contractors and pipeline wholesalers to purchase supporting accessories in bulk.

Certifications & Compliance Standards

Each batch of Flexible Rubber Joint for Valve Systems undergoes strict factory testing to match the operating standard of supporting Industrial Valve, Ball Valve, Gate Valve, Globe Valve, Butterfly Valve and Check Valve. Complete inspection items include:

Raw rubber material anti-aging and tensile strength test
Multi-layer cord fabric and steel wire ring structural strength inspection
1.6MPa full hydraulic pressure leakage resistance test
Galvanized flange coating thickness and corrosion resistance detection
Multi-direction displacement compensation performance simulation test

Factory inspection reports and product qualification certificates can be provided for engineering acceptance, project bidding and bulk export customs clearance procedures.

Customization Options

We offer targeted customization for pipeline contractors, valve distributors and engineering equipment suppliers:

Custom non-standard sizes beyond DN50-DN300 range for special Industrial Valve matching demands
High-pressure resistant rubber formulation upgrade for heavy-duty pipeline working pressure above 1.6MPa
Oil-resistant, acid and alkali resistant rubber layer for chemical industry pipeline supporting Ball Valve and Gate Valve
Stainless steel flange replacement for coastal high salt fog corrosion environment
Custom marking and private label packaging for valve wholesaler unified supporting sales kits

Production Process & Strict Quality Control

Raw natural rubber mixing with anti-aging agents for inner and outer rubber layers
Multi-layer polyamide cord fabric and steel wire ring layered winding forming
High-temperature integrated vulcanization molding of rubber joint main body
Ductile iron flange casting, polishing and hot-dip galvanizing anti-corrosion treatment
Assembly of rubber body and flanges for finished product semi-finished inspection
1.6MPa hydraulic pressure leakage test and displacement performance detection
Appearance flaw sorting and size rechecking before finished product storage
Dust-proof packaging for long-distance transportation matched with all types of valve products.