bonded sealing washer

Usit ring, bonded washer, rubber bonded metal washer

 

Type of Bonded washer

 

Standard and Self-centralizing, lockseals range , bodok

 

The drawing for Standard type of bonded sealing washer

 

 

the drawing for Self-centralising type of bonded sealing washer

 

 

What is bonded washers?

 

Bonded washer seals are Commonly known as Dowty Seals, which were originally designed to replace copper type washer which are used in high pressure systems, they are comprised of metal washer and an elastomeric ring which is boned inside the diameter. the metal washer prevents over-comprssion and limits deformation of the elastomeric rings.

And the bonded washer are applied in high pressure seals, which are used in Mechanical, hydraulic and Pneumatic sectors. Particularly suitable for sealing under the heads of bolts and threaded components, for Pipe Couplings and a wide range of connector applications where a perfect face-to-face contact is required for sealing gases, oils, and other fluids.

 

Bonded washer Chariacteristics:

 

• Ideal Pressure gasket.
• Reliabale sealing at high & low pressure system or sectors.
• High & low temperature capbility
• Reduced bolt troque with no loss of tightening Loads.
• Metal ring prevents rubber compression.

 

Material of bonded seals

 

• Metal - Mild steel, Copper, stainless steel, brass, carbon, Aluminium alloy,aluminiu bronze etc.
• Rubber - Nitrile (NBR), Viton® (FKM/FPM), Hydrogenated Nitrile (HNBR), & Ethylene propylene (EPDM), Fluorosilicone (FVMQ).
• Plating - Zinc , Clear Passivate, Gold Passivate, Chromic Anodise, Sulphuric Anodise, Iron and Black Chromate, Sherardize 2000

 

Bonded washer dimensions 

 

Metric and imperial size are available for Topseals.

Standardsize and customized are available for topseals.

 

• Bolt size (imperial)
• BSP
• German Metric
• French Metric

 

 

Metric bonded washer size and imperial bonded washer size are available in stock 

 

Bonded seals standard in metric size as below:

M6,M8,M10,M14,M16,M18,M20,M22,M24,M26, M27,M30,M33,M36,M39,M42,M45,M42,M45,M48,M52,M60

Imperial size and metric size for self centering bonded washer

G1/8,G1/4,G3/8,G1/2,G5/8,G3/4,G1,G1-1/4,G1-1/2,G2

M8,M10,M14,M16,M18,M20,M22,M24,M27,M26, M30,M33,M36

 

Bonded washer seals imperial size chart (Self-centering bonded sealing washer ,BSP standard )

 

THREAD SIZE	REF No.	ID  ±0.10	OD +0.13 / - 0	H ± 0.10	F ± 0.20
1/8 BSP	820-A	10.37	15.88	2.00	8.56
	820-B	10.37	15.88	2.00	8.26
1/4 BSP	821-A	13.74	20.57	2.00	11.45
	821-B	13.74	20.57	2.00	11.18
3/8 BSP	823-B	17.28	23.80	2.00	14.96
1/2 BSP	825-A	21.54	28.58	2.50	18.64
	825-B	21.54	28.58	2.50	18.24
5/8 BSP	826	23.49	31.75	2.50	20.27
3/4 BSP	827-A	27.05	34.93	2.50	24.13
	827-B	27.05	34.93	2.50	23.83
7/8 BSP	829	30.81	38.10	2.50	27.51
1 BSP	830(H2.5)	33.89	42.80	2.50	29.92
	830(H3.2)	33.89	42.80	3.20	29.92
1  1/4 BSP	832(H2.5)	42.93	52.38	2.50	38.45
	832(H3.2)	42.93	52.38	3.20	38.45
1  1/2 BSP	833(H2.5)	48.44	58.60	2.50	44.45
	833(H3.2)	48.44	58.60	3.20	44.45
1  3/4 BSP	834	54.89	69.85	3.20	50.42
2 BSP	836(H2.5)	60.58	73.03	2.50	56.26
	836(H3.2)	60.58	73.03	3.20	56.26
2  1/4 BSP	838	66.68	79.50	3.20	62.36
2  1/2 BSP	839	76.08	90.17	3.20	71.50

 

Bonded washer seals Metric size chart (self-centering bonded seal washer )

 

THREAD SIZE	REF No.	ID  ±0.10	OD +0.13 / - 0	H ± 0.10	F ± 0.20
M5	203	5.70	9.00	1.00	4.50
M5	204	5.70	10.00	1.00	4.50
M6	206	6.70	10.00	1.00	4.70
M6	207	6.70	11.00	1.00	4.70
M8	212	8.70	13.00	1.00	6.40
M8	866	8.70	14.00	1.00	6.40
M10	217	10.70	16.00	1.50	8.05
M10	218	10.70	18.00	1.50	8.05
M12	222	12.70	18.00	1.50	9.73
M12	867	12.70	19.00	1.50	9.73
M12	223	12.70	20.00	1.50	9.73
M14	868	14.70	22.00	1.50	11.38
M16	869	16.70	24.00	1.50	13.41
M18	872	18.70	26.00	1.50	14.76
M20	873	20.70	28.00	1.50	16.76
M22	874	22.70	30.00	2.00	18.74
M24	875	24.70	32.00	2.00	20.11
M26	239	26.70	35.00	2.00	22.30
M27	240	27.20	36.00	2.00	23.30
M30	242	31.00	39.00	2.00	25.70
M32		32.70	40.00	2.00	31.80
M33	243	33.70	42.00	2.00	28.70
M36	245	36.70	46.00	2.00	31.10
M42	247	42.70	53.00	3.00	36.50

 

Remarks: above Usit ring, bonded washer, rubber bonded metal washer size only for ref, bonded sealing washer size details whatever metric size dowty washers and imperial bonded seals size or in different shape, which need to be check with topseals' engineer for your application.

 

As Bonded seals supplier we can provide all bonded washer in different size and shape .