Flat seals

Washer-shaped rubber gaskets provide a larger sealing surface than traditional O-rings, ensuring high performance under both low and high compression. Suitable for a wide range of static and dynamic applications, they adapt well to varying pressure levels. The choice of rubber compound and hardness is critical, as even small changes can significantly impact elasticity, deformation, and durability. These gaskets are ideal for industrial environments requiring long-lasting and efficient sealing solutions.

Categoria:

Description

Main advantages of flat seals:

– Reliable sealing against liquids and gases
– Wide range of materials and thicknesses
– Excellent mechanical and chemical resistance
– Good dimensional stability
– Easy to install and replace
– Custom-made versions available

BARBIERI can produce this particular type of seal using two different manufacturing processes:

– Using a mold

– Using a molded sleeve

O.D. I.D. H min – H max (from the cutting sleeve)
O.D. I.D. H min – H max (from the cutting sleeve)
10 4,5 1-50
10 6 1-50
12 5 1-30
12 6 1-30
12,6 10 1-75
12,8 10 1-70
14,5 10 1-70
15,6 8,5 1-58
15,2 11,1 1-60
17,8 11 1-70
18 10 1-70
18 11,8 1-70
19 10 1-70
19,2 11,5 1-80
19,5 10,5 1-80
19,6 10 1-70
20 6,5 1-55
20 10,5 1-35
20 11 1-80
20 12 1-80
20 13 1-70
22 8 1-70
22 16,5 1-70
22,4 17,5 1-70
23 9 1-70
23 17 1-70
23,5 12 1-70
23,5 14,8 1-70
24 12 1-80
24 18 1-70
24,5 17 1-70
25 13,5 1-70
25 14 1-70
25 19 1-70
26 6 1-/
26 12 1-70
26 9 1-80
26 17,6 1-70
27 15 1-70
27 16 1-70
27 20 1-70
28 6,5 1-70
28 15 1-70
28 18 1-70
28 20 1-70
29,5 14,5 1-70
30 12 1-70
30 16 1-90
30 25 1-70
30,5 20 1-70
30,7 20 1-70
31 23 1-80
31,5 20 1-70
32 26 1-70
33 21 1-70
35 20 1-70
35 26 1-70
35,9 25,9 1-70
36 32 1-70
36,9 26,9 1-70
38 23 1-70
38 26 1-70
38 28 1-56
38 30 1-70
38,5 25 1-70
39 30,5 1-70
39,2 28,5 1-70
39,5 27,5 1-70
40 9 1-70
40 25 1-80
40 46 1-80
42 25 1-70
42,7 32,7 1-70
43 11 1-40
43 27 1-70
44 34 1-70
44 35 1-70
44 38 1-80
44,9 34,9 1-70
45 33 1-70
45 40 1-70
45,5 33 1-70
46 33 1-70
46 40 1-70
47 30 1-70
47 40 1-70
47 41 1-80
47 42 1-70
47,7 42,5 1-70
48 31,5 1-80
49 29 1-70
49 39 1-70
49,5 39,5 1-70
50 20 1-60
50 29 1-70
50 32 1-70
50 40 1-70
50 44 1-80
50,3 44,5 1-80
51,5 10,5 1-25
53,5 45,3 1-80
54 26 1-70
54,1 48,1 1-80
56 26 1-70
56 44 1-70
58 38 1-70
58 41,5 1-70
58 42 1-70
58 47 1-70
58 49 1-70
58 52 1-80
59 47 1-70
60 30 1-70
60 36 1-70
60,1 69,34 1-80
60 40 1-70
60 54 1-70
62 19 1-35
62 56 1-70
65,8 60 1-70
65,6 55,7 1-70
67 47 1-70
67 48 1-70
68 49 1-70
69,34 60,1 1-70
70 47 1-70
70 63,5 1-70
72 61,2 1-70
72 62 1-80
75,60 63 1-70
72 68 1-70
73 56 1-70
74 68 1-70
75 59 1-70
77 60 1-70
78 39 1-20
78 42 1-70
80 54 1-70
80 56 1-70
82 45 1-70
84 59 1-70
84 75 1-70
84,2 75,1 1-70
87 78 1-70
88,4 77 1-70
90,5 87,5 1-70
92 70 1-70
94 72,5 1-70
94 75,5 1-70
94 82 1-70
94,5 76 1-70
100 80 1-70
100 97 1-70
105,5 88,5 1-70
106 88 1-70
106 92 1-70
107 92 1-70
107,5 87 1-70
108 97 1-70
110 90 1-70
110 102 1-70
114,5 96,5 1-70
115 96 1-70
115,7 95 1-70
123 112 1-80
124 90 1-70
133 112 1-70
140 132 1-70
160 130 1-70

Flat seals in rubber are essential components for ensuring effective sealing in a wide range of industrial applications. Additionally, they are made from high-quality materials that resist pressure, vibration, and chemical exposure. Therefore, they protect mechanical parts and extend the life of equipment.

Flat seals come in various shapes and sizes. For instance, flat rubber washers, sealing washers, and rectangular-section gaskets can fit perfectly on pipes, valves, and industrial devices. Thanks to their flexibility, rubber washers provide uniform contact between metal surfaces, reducing wear and preventing leaks.

Flat seals can also be manufactured as rubber sleeves, ideal for protecting and isolating cables, shafts, or sensitive components. Moreover, their elasticity allows them to adapt to different tolerances, ensuring a perfect seal every time.

In addition, different rubber compounds are available. This means you can get custom rubber sealing gaskets that resist high temperatures, chemicals, and abrasion. Thus, every project can rely on durable and safe components, minimizing the risk of leaks or failures.

Whether for industrial, automotive, or electromechanical applications, flat seals in rubber offer safety, efficiency, and long service life. Finally, the variety of shapes, sizes, and materials makes these components essential for anyone seeking high performance and reliable sealing.

Additional information

Using a mold

The manufacturing process for molding of individual rubber seals makes it possible to achieve extremely limited tolerances, but the edges of the seal cannot have a radius of 0 due to mold processing requirements.

– Good surface finish
– Very narrow tolerances
– Possibility of small production runs

On the other hand, it is not possible to obtain gaskets with sharp edges.
Using a molded sleeve

This manufacturing process involves cutting the seal from a molded rubber sleeve.

First of all, a rubber sleeve is molded with the exact internal and external diameter of the finished seal but with a much greater length. Once this “rubber pipe” has been obtained, it is cut using special machinery to the required thickness, thus creating the required seal. This system produces perfectly flat seals with 0 radius edges.

However, to obtain economical rubber seals using this manufacturing process it is necessary to produce medium to large runs.

In short, the advantages of using this seal manufacturing process are:

– Thickness tolerance +/- 0.10.

– Excellent quality-price ratio, in particular for large quantities.

– Perfectly flat pieces, which can also be used for automatic assembly.

– Ability to create seals of different thicknesses using the same sleeve, without having to go to the expense of additional molds.

– Maximum seal thanks to the sharp edges.
Production minimum quantity

Washers are produced on commission; we don't keep them in stock.

The minimum production quantity is 10,000 Pcs
Materials

Standard materials used for rubber flat seals:
SBR

Styrene-butadiene rubber
EPDM

Ethylene-pylene terpolymer
EPDM Perox

Perox Peroxide EPDM
NBR

Nitrile rubber
VMQ

Silicone rubber