SINGLE SPHERE RUBBER FLEXIBLE JOINT PN25

PN25 Fig No.: F83SJ-I

GENERAL

Absorbs and reduces vibration and shock in the system
Absorbs the stress generated by the expansion and compression of the pipe line
Provides flexibility to the system as allowance connection and installation error
Excellent resistance against pressure

FEATURES

Molded and vulcanised in hydraulic presses
Solid carbon steel internal reinforcing ring
With BS 4504 PN25 / EN 1092-2 PN25 / ANSI CLASS 150 floating flanges (Specify on order)

APPLICATIONS

Building Services, Air-Conditioning, Fire-Protection, Cold Water Plumbing, Sewerage & Water Treatment, Marine Services, General Industries
Suitable for suction and discharge within specify working pressure.

Category: V-Series

Description

MATERIAL SPECIFICATIONS

Part	Material
Flanges	Carbon Steel
Reinforcing Ring	Carbon Steel
Inner Rubber	EPDM
Outer Rubber	EPDM
Reinforcing Cord	Nylon
Control Rod	Mild Steel

OPERATING PRESSURE & TEMPERATURE

DIMENSIONS AND MOVEMENTS

Diameter		Dimension	Pre-Gap	Allowable Movements(mm)
mm	inch	L(mm)	L(mm)	Axial Elongation (mm)	Axial Compression (mm)	Lateral Displacement (mm)	Angle of Deflection (“)
25	1	95	90-100	6	9	9	15
32	1¼	95	90-100	6	10	9	15
40	1½	95	90-100	6	10	9	15
50	2	105	100-110	7	10	10	15
65	2½	115	110-120	8	13	12	15
80	3	130	125-135	8	15	12	15
100	4	150	145-155	10	15	15	15
125	5	170	165-175	12	19	15	15
150	6	180	175-185	12	20	15	15
200	8	195	190-200	12	20	22	10
250	10	230	225-235	16	28	22	10
300	12	245	240-250	16	28	25	10
350	14	200	195-205	16	20	20	10
400	16	200	195-205	15	20	20	10
450	18	200	195-205	15	20	20	10
500	20	200	195-205	15	20	20	10
600	24	265	260-270	16	28	28	10

USE OF CONTROL UNITS WITH RUBBER FLEXIBLE JOINTS

A control unit assembly is an accessory of two or more control rod units (limit rods, tie rods or compression sleeves) placed between the flanges across a flexible joint to minimize possible destruction caused by excessive motion of a pipeline. When used in this manner, control units are an additional safety factor which can minimize possible damage to the adjacent equipment.
A control unit is strongly recommended to use when:
– In case that proper anchoring cannot be provided
– In case that it is hard to withstand the line thrusts generated by internal pressure or wide temperature fluctuations
– In case that the anticipated elongation, compression and lateral movement are more than the design, pre-gap and/or installation tolerance
– In case that the anticipated angle of deflection is more than the design and/or installation tolerance.