KDF-F Flanged Single Ball Limited Rubber Flexible Joint

Overview

The KDF-F flanged rubber flexible joint is an improved version of the KXT single-ball rubber joint, designed to accommodate greater displacement and pressure according to user requirements. More importantly, it addresses the issue of rubber joints detaching under excessive pressure. The improved large flanged rubber joint has a sealing surface that aligns with the outer diameter of the butt-welded flange, and the sealing surface also features drilled holes. This fully integrates the rubber joint with the pipeline, enhancing the stability of pipeline operations.

It is a high-elasticity, high-airtightness, medium-resistant, and weather-resistant pipeline joint. It features high internal density, can withstand higher pressures, and exhibits excellent elastic deformation performance.

Rubber flexible joints are composed of fabric-reinforced rubber components and loose-fitting metal flanges, used for vibration reduction, noise reduction, and compensation of displacement in pipelines. Strict adherence to standards and raw material quality requirements is enforced to eliminate any shortcuts in production. The raw materials for the product must not only be new but also of the highest grade. Rubber joints are also known as flexible rubber joints, pipeline vibration dampers, vibration-proof hoses, and flexible connectors, among other names.

Features

1. Compact size, lightweight, excellent elasticity, and easy to install and maintain.  

2. During installation, it can accommodate lateral, axial, and angular displacement, unaffected by misaligned pipes or parallel flanges.  

3. During operation, it reduces structural noise transmission and has strong vibration-damping capabilities.

Due to its excellent comprehensive performance, the rubber joint is widely used in chemical, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, and power engineering projects, particularly suitable for pipelines subject to significant vibration and frequent temperature changes.

Manufactured using a new air-blown mold process, the product consists of a spherical body composed of inner rubber layers, reinforcing layers, middle rubber layers, and outer rubber layers, combined with loose-fitting forged low-carbon steel flanges. It features high pressure resistance, good elasticity, large displacement capacity, excellent vibration absorption and noise reduction effects, and easy installation. It can be widely used in water supply and drainage, HVAC, fire protection, compressors, papermaking, pharmaceuticals, shipping, pumps, fans, and other pipeline systems.

Rubber joints are composed of fabric-reinforced rubber components and loose-fitting metal flanges, used for vibration isolation, noise reduction, and displacement compensation in pipelines. They are high-elasticity, high-airtightness, medium-resistant, and weather-resistant pipeline joints. Strict adherence to standards and raw material quality requirements eliminates any shortcuts in production. ~Standard raw materials not only require new materials but also ~grade new materials.

Specification

技术参数

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

Item |Medol	KXT-10	KXT-16	KXT-25	A. If media is oil, acid or alkali. B. If special requirements for working temperature C. If OEM orders with drawings or samples D. Please Inform us about above when ordering
MpaWoring pressure	1.0(10)	1.6(16)	2.5(25)
Mpa Burst Pressure	2.0(20)	3.0(30))	4.5(45)
Kpa Vacuum	53.3(400)	86.7(650)	100(750)
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

DN Nominal Diameter （mm）		LengthLmm	LengthLmm	Axial displacement mm		Haorizontal isplacement mm	Angular deflection(a1+a2)°
mm	inch			Extension	Compression
32	1.25	95	130/150	6	9	9	15
40	1.5	95	130/150	6	10	9	15
50	2	105	130/150/200	7	10	10	15
65	2.5	115	130/150/200	7	13	11	15
80	3	135	130/150/200	8	15	12	15
100	4	150	130/200	10	19	13	15
125	5	165	130/150/200	12	19	13	15
150	6	180	130/150/200	12	20	14	15
175	7	200	/	12	20	14	15
200	8	200	130/150/210	16	25	22	15
225	9	200	/	16	25	22	15
250	10	230	130/150/200	16	25	22	15
300	12	245	130/150/200	16	25	22	15
350	14	255	130/150/200	16	25	22	15
400	16	255	200	16	25	22	15
450	18	255	200	16	25	22	15
500	20	255	200	16	25	22	15
550	22	255	/	16	25	22	15
600	24	260	200	16	25	22	15
700	28	260	/	16	25	22	15
800	32	260	/	16	25	22	15
900	36	260	/	16	25	22	15
1000	40	260	/	18	26	24	15
1200	48	260	/	18	26	24	15
1400	56	350	/	20	28	26	15
1600	64	350	/	25	35	30	10
1800	72	350	/	25	35	30	10
2000	80	350	/	25	35	30	10
2200	88	400	/	25	35	30	10
2400	96	400	/	25	35	30	10
2600	104	400	/	25	35	30	10
2800	112	400	/	25	35	30	10
3000	120	400	/	25	35	30	10
Notes: 1. For OEM orders with special requirement, rubber joints can be made according to customers' drawings. Generally, other GB, JB, HG, CB, ANSI, DIN, BSEN, NF, EN, JIS, flanges are also available upon request. Material of rubber body can be NR natural rubber, EPDM, Neoprene, IIR butyl rubber, NBR Buna-N, FKM, etc. 2.When rubber joints size above DN200 are used for overhead water supply system, the pipes must be equipped with fixed supports or fixed brackets, otherwise control units shall be installed on rubber joints. 3.Matching flanges of rubber joints shall be valve flanges .