PTFE lined rubber joint

Overview

PTFE provides added resistance to aggressive chemicals and temperatures versus a traditional rubber tube expansion joints.They provide an option for lower sound transmitting and dampening compared to metallic expansion joints, as well as reduce the chance of electrolysis when mating dissimilar metals.Expansion joints shall be a rubber spool type of a single, open wide arch design. Joint construction shall consist of a EPDM tube and cover with an integral PTFE liner.  Joints shall be designed to meet the design pressures and temperature for the system . 
Expansion joints ends shall be flanges drilled to 150# class standards, and be full rubber faced and integral to the body. Split flange backing rings of galvanized carbon steel shall be provided.
Expansion joints shall be capable of accommodating piping system and equipment movements and vibration as needed .
Control units with tie rods of galvanized carbon steel  shall be included to prevent overextension of the expansion joints from pressure thrust loads .  The number and size of the control rods shall be sufficient for the maximum system test pressure.
 

Features

• The excellent chemical resistance of PTFE
• The flexibility of rubber expansion joints
• Thermal stability
• Anti-stick properties
• Available in multiple arch, taper, offset and special constructions

Specification

Working pressure Mpa (kgf/cm2)	1．0 (10)	Angular deflection	45°
Explosion pressure Mpa (kgf/cm2)	3.0 (30)	Vacuum Kpa (mm/Hg)	53.3 (400)
Applicable Temperature	-15℃-115℃(-30℃-250℃ under special conditions)
Applicable media	water, sea water, hot water, air, compressed air, oil, acid, alkali and so on

 

Technical parameters of rubber bellows joints

 

No.	Part	Material
1	Body	NR, CR, IIR, NBR, FKM, EPDM
2	Inner & Outer Rubber	NR CR IIR NR FKM EPDM PTFE
3	Body Carcass	Nylon cord fabric
4	Reinforcing Ring	Multi-strand coppering steel wire
5	threaded union rubber joint	Cast and forged carbon steel(Q235), Stainless steel(201, 304, 316, 321), Plastic(CPVC, PVDF, PPH, UPVC, RPP)

 

Technical parameters

 

Item |Medol	KST-L-10	KST-L-16	If media is oil, acid or alkali, please inform us special requirements for working temperature and OEM orders with drawings or samples when ordering.
MpaWoring pressure	1.0(10)	1.6(16)
Mpa Burst Pressure	2.0(20)	3.0(30))
Kpa Vacuum	53.3(400)	86.7(650)
Applicable Temperature	-20℃~+115℃(-30℃~+250℃ under special conditions)
Applicable Medium	Air, compressed air, water, sea water, oil, acid, alkali, etc.
Note: the materials of main parts are the same with those of KXT type

 

Main date

 

Nominal Diameter （mm）		LengthLmm		Axial displacement mm		Haorizontal isplacement mm	Angular deflection(a1+a2)°
mm	inch	A型	B型	Extension	Compression
15	0.5	180	200	5	10	20	45
20	0.75	200	200	5	10	20	45
25	1	210	200	5	10	20	45
32	1.25	210	200	5	10	20	45
40	1.5	220	200	5	10	20	45
50	2	220	220	5	10	20	45
65	2.5	240	240	5	10	20	45
80	3	285	285	5	10	20	45
Notes:1. For OEM orders with special requirement, threaded rubber expansion bellows should be made according to customers' drawings. Thread standard can be ISO, ASME, BS, JIS, etc. Material of rubber body can be NR natural rubber, EPDM, Neoprene, IIR butyl rubber, NBR Buna-N, FKM, etc.