Hongze Valve
One-Stop Supplier for Rubber Joints, Bellows, and Waterproof Casings
Food Grade Rubber Expansion Joints
Food Grade Rubber Expansion Joints, also known as silicone or sanitary rubber expansion joints, are specially designed for hygienic, high-purity, or high-temperature pipeline systems. Manufactured from premium food-grade or medical-grade silicone rubber, these joints offer outstanding heat resistance, flexibility, and chemical stability. They are ideal for food processing, pharmaceutical, beverage, and clean water systems, effectively absorbing vibrations, reducing noise, and compensating for axial and lateral movement, all while ensuring product purity and safety.
Key Features
Technical Specifications
| Nominal Diameter (DN) | Inch | Length (L) mm | Flange Thickness (b) mm | Bolt Qty (n) | Bolt Hole Dia. mm | Bolt Circle Dia. (D1) mm | Axial Extension mm | Lateral Displacement mm | Angular Deflection (°) |
|---|---|---|---|---|---|---|---|---|---|
| DN32 | 1.25” | 95 | 16 | 4 | 18 | 100 | 6 | 9 | 9 |
| DN40 | 1.5” | 95 | 18 | 4 | 18 | 110 | 6 | 10 | 9 |
| DN50 | 2” | 105 | 18 | 4 | 18 | 125 | 7 | 10 | 10 |
| DN65 | 2.5” | 115 | 20 | 4 | 18 | 145 | 7 | 13 | 11 |
| DN80 | 3” | 135 | 20 | 4 | 18 | 160 | 8 | 15 | 12 |
| DN100 | 4” | 150 | 22 | 8 | 18 | 180 | 10 | 19 | 13 |
| DN125 | 5” | 165 | 24 | 8 | 18 | 210 | 12 | 19 | 13 |
| DN150 | 6” | 180 | 24 | 8 | 23 | 240 | 12 | 20 | 14 |
| DN200 | 8” | 210 | 24 | 8 | 23 | 295 | 16 | 25 | 22 |
| DN250 | 10” | 230 | 26 | 12 | 23 | 350 | 16 | 25 | 22 |
| DN300 | 12” | 245 | 28 | 12 | 23 | 400 | 16 | 25 | 22 |
| DN350 | 14” | 255 | 28 | 16 | 23 | 460 | 16 | 25 | 22 |
| DN400 | 16” | 255 | 30 | 16 | 25 | 515 | 16 | 25 | 22 |
| DN450 | 18” | 255 | 30 | 20 | 25 | 565 | 16 | 25 | 22 |
| DN500 | 20” | 255 | 32 | 20 | 25 | 620 | 16 | 25 | 22 |
| DN600 | 24” | 260 | 36 | 20 | 30 | 725 | 16 | 25 | 22 |
| DN700 | 28” | 260 | 36 | 24 | 30 | 840 | 16 | 25 | 22 |
| DN800 | 32” | 260 | 38 | 24 | 34 | 950 | 16 | 25 | 22 |
| DN900 | 36” | 260 | 42 | 28 | 34 | 1050 | 16 | 25 | 22 |
| DN1000 | 40” | 260 | 44 | 28 | 34 | 1160 | 18 | 26 | 24 |
| DN1200 | 48” | 260 | 48 | 32 | 41 | 1380 | 18 | 26 | 24 |
| DN1400 | 56” | 350 | 44 | 36 | 34 | 1560 | 20 | 28 | 26 |
| DN1600 | 64” | 350 | 46 | 40 | 34 | 1760 | 25 | 35 | 30 |
| DN1800 | 72” | 350 | 52 | 44 | 41 | 1970 | 25 | 35 | 30 |
| DN2000 | 80” | 420 | 54 | 48 | 48 | 2180 | 25 | 35 | 30 |
| DN2200 | 88” | 580 | 40 | 52 | 48 | 2390 | 25 | 35 | 30 |
| DN2400 | 96” | 610 | 41 | 56 | 48 | 2600 | 25 | 35 | 30 |
| DN2600 | 104” | 650 | 42 | 60 | 54 | 2810 | 25 | 35 | 30 |
| DN2800 | 112” | 680 | 45 | 64 | 54 | 3020 | 25 | 35 | 30 |
| DN3000 | 120” | 680 | 50 | 68 | 54 | 3220 | 25 | 35 | 30 |
Notes
Customization available upon request with specific drawings or specifications; flanges are based on the “National General Water Supply and Drainage Standard Atlas,” others follow HG/T2289-92.
For DN350-600(2) models, working pressure is 1.6MPa; for DN32-400(3) models, working pressure is 2.5MPa.
For DN700-DN200 models, working pressure is 1.0MPa; for DN1400, working pressure is 0.6MPa; for DN1600-DN1800, working pressure is 0.4MPa, flanges are selected according to 0.6MPa; for DN2000, working pressure is 0.25MPa, flanges are selected according to 0.6MPa pressure.
For high-rise water supply, products above DN200 must have fixed supports or brackets; otherwise, anti-pullout devices should be installed.
| Project | Unit | JGD-1 | JGD-2 | JGD-3 |
|---|---|---|---|---|
| Model | – | JGD-1 | JGD-2 | JGD-3 |
| Working Pressure | MPa (kgf/cm²) | 1.0 (10) | 1.6 (16) | 2.5 (25) |
| Burst Pressure | MPa (kgf/cm²) | 2.0 (20) | 3.0 (30) | 4.5 (45) |
| Vacuum Resistance | KPa (mmHg) | 53.3 (400) | 86.7 (650) | 100 (750) |
| Operating Temperature | °C | -15 ~ 115°C (Special: -30 ~ 250°C) | – | – |
| Applicable Media | – | Air, Compressed Air, Water, Seawater, Hot Water, Oil, Acid, Alkali, etc. |
| Material | Temperature Range (°C) | Oil Resistance | Acid & Alkali Resistance | Elasticity | Abrasion Resistance | Typical Applications |
|---|
| EPDM | -40 ~ 120 | Poor | Excellent | Excellent | Medium | Water, Steam, Air |
| NR (Natural Rubber) | -30 ~ 80 | Poor | Medium | Excellent | Excellent | Industrial Water, Air |
| NBR | -20 ~ 100 | Excellent | Medium | Good | Good | Oil, Lubrication Systems |
| Neoprene | -35 ~ 100 | Good | Good | Medium | Good | Seawater, Mild Chemicals |
| Silicone | -60 ~ 200 | Poor | Poor | Good | Low | Food Grade, Medical |
| FKM (Viton) | -20 ~ 250 | Excellent | Excellent | Medium | Excellent | Chemical, High Temp Oil |
| Butyl (IIR) | -40 ~ 120 | Poor | Good | Excellent | Medium | Gas, Acidic Gases |
What makes Food Grade Rubber Expansion Joints suitable for hygienic applications?
Food Grade Rubber Expansion Joints are made from certified food-grade or medical-grade silicone rubber, which is non-toxic, odorless, and resistant to bacteria. This ensures the joint does not contaminate products and meets strict health and safety standards required in food, pharmaceutical, and clean water systems.
Where are Food Grade Rubber Expansion Joints commonly used?
They are widely used in food and beverage processing, pharmaceutical manufacturing, clean water pipelines, and any application that requires high standards of hygiene, flexibility, and temperature resistance.
What are the main advantages of using Food Grade Rubber Expansion Joints?
The main benefits include excellent heat and chemical resistance, high flexibility, ability to absorb vibrations and compensate for pipe misalignment, and compliance with international food safety standards.
Can you provide custom sizes or materials for Food Grade Rubber Expansion Joints?
Yes, we offer OEM and ODM services. Custom sizes, materials, and flange types are available to meet the specific requirements of your hygienic or high-purity piping systems.
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