China Flexibility Rubber Expansion Joint For Thermal Expansion Contraction And Vibration Absorption Made From Flexible, Durable Materials Such As EPDM NBR Neoprene Or Viton Integral Or Loose Flanges For Secure Conne for sale

Flexibility Rubber Expansion Joint For Thermal Expansion Contraction And Vibration Absorption Made From Flexible, Durable Materials Such As EPDM NBR Neoprene Or Viton Integral Or Loose Flanges For Secure Conne

Name: Flexibility Rubber Expansion Joint For Thermal Expansion Contraction And Vibration Absorption Made From Flexible, Durable Materials Such As EPDM NBR Neoprene Or Viton Integral Or Loose Flanges For Secure Conne
Brand: Henan Zhicheng Valve Fittings Manufacturing Co., Ltd.

Price Negotiable

Price: 3.5

MOQ: 1

Delivery Time: 5-8work days

Brand: ZHICHENG

Product Description

A rubber expansion joint with a built-in negative pressure ring is a type of flexible

connector used in piping systems to compensate for thermal expansion, vibrations,

and slight misalignments. The negative pressure ring (also called a vacuum support

ring or anti-collapse ring) is an internal structural component designed to prevent the

rubber joint from collapsing inward when exposed to negative pressure or vacuum

conditions.

Installation technical parameters

NO	Name	Material
1	Outer/inner rubber	NR, EPDM, NBR, Neoprene etc.
2	Frame	Nylon cord fabric
3	Pressurized ring	Steel wire strand
4	Flange	Carbon steel galvanized, paint ductile iron, stainless steel etc.

Operation condition
Working temperature		-15℃~80℃(-30℃~150℃)
Working pressure		6-40bars(PN6-PN40)
Test pressure		1.5 times of working pressure
Explosion pressure		2 times of working pressure
Applicable media		Air, water, sewage, sea water, acid, alkali, oil etc.

Key Features of Rubber Expansion Joints with Negative Pressure Rings

1. Rubber Body:

• Made from flexible materials like EPDM, NBR, Neoprene, or Viton, depending on the

fluid or gas being transported.

• Absorbs vibrations, reduces noise, and compensates for movements in the piping system.

2. Negative Pressure Ring:

• Usually made of stainless steel, carbon steel, or reinforced plastic.

• Installed inside the rubber joint to provide structural support under vacuum or low-pressure

conditions.

• Prevents the rubber walls from collapsing inward when the system experiences a negative

pressure.

3. Reinforcement Layers:

• The rubber body is reinforced with fabric or metal wire for added strength and durability.

• Works in combination with the negative pressure ring to handle both positive and negative

pressure conditions.

4. Flanged Ends:

• The joint typically has integral flanged ends for easy connection to the piping system.

• The flanges can conform to standards like ASME, DIN, or JIS.

Advantages

1. Prevention of Collapse:

• The negative pressure ring ensures the integrity of the joint under vacuum conditions.

2. Improved Longevity:

• Reduces stress on the rubber body, extending the service life of the expansion joint.

3. Vibration Absorption:

• Maintains the joint’s flexibility and vibration-dampening properties even in vacuum

scenarios.

4. Customizable:

• Available in various sizes, pressure ratings, and materials to suit different applications.

choose the products of ZHICHENG ?
1.24 hours online service-- anytime, anywhere can provide what you want.
2.100% quality inspection before shippment.
3.Strong production capability and strict quality control.

Packing & Delivery

Packaging

1.Inner package: plastic film with carton cases.
2.Outer package: wooden cases(usually the size of 1100mm*1100mm*1100mm).

Product installation

When the customer installs, we will provide installation instructions, installation

notes and maintenance instructions. and this
is the installation picture of the DN1800 rubber expansion joint.

FAQ

Q: Are you a trading company or a manufacturer?
A: We are manufacturers of rubber expansion joints, metal expansion joints, flexible hoses,

dismantling joints, trimmer joints,flange adapters and flanges with over 30 years experience.
Q: Do you have a catalogue?
A: Yes, we do. Please let me know your email or instant messenger and we will send you our

catalogue.
Q: Can you provide drawings and technical information?
A: Yes, our specialist technical department will design and supply drawings and technical data.
Q: Do you provide samples? Are they free of charge or do you charge for them?
A: Yes, we can provide samples free of charge, but transport costs are borne by the customer.
Q: Can the products be manufactured to the customer's requirements?
A: Yes, the above specifications are standard specifications and we can design and manufacture

as required.

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Get in Touch

Have questions about our products or want to discuss a custom order? Our team is ready to help you.

Company Henan Zhicheng Valve Fittings Manufacturing Co., Ltd.

Location Pipeline Industrial Park, Xicun Town, Gongyi City, Henan Province, China

Contact Person Liu Shan

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Flexibility Rubber Expansion Joint For Thermal Expansion Contraction And Vibration Absorption Made From Flexible, Durable Materials Such As EPDM NBR Neoprene Or Viton Integral Or Loose Flanges For Secure Conne

Product installation

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