GB/T 15325-1994 Appearance quality of reciprocating rubber sealing rings
Some standard content:
National Standard of the People's Republic of China
Appearance quality of reciprocating rubber seals
Appearance quality [or reciprocating rubber seals
1 Main content and scope of application
This standard specifies the appearance quality requirements of reciprocating rubber seals and their pressure rings, support rings and retaining rings.
GB/T 15325-94
This standard applies to the appearance quality requirements of rubber seals and their pressure rings, support rings and retaining rings on the piston and piston rod of the pressure reducing cylinder 2 Reference standard
GB10708 Structural dimension series of reciprocating rubber seals 3 Classification
3.1 In order to facilitate the specification of appearance quality, reciprocating rubber seals, pressure rings, support rings and retaining rings are divided into the following four categories. 3.1.1 Rubber seals, such as Y-shaped rubber seals, mountain-shaped rubber seals, rubber dustproof seals, etc. 3.1.2 Fabric-sandwiched rubber sealing surface, such as V-shaped rubber sealing diaphragm, shaped rubber sealing pattern, shaped rubber sealing ring, etc. 3.1.3 Rubber sealing ring with metal skeleton, such as rubber dustproof sealing pattern with metal frame, etc. 3.1.4 Compression ring, support ring and retaining ring
3.2 The surface of reciprocating rubber sealing ring is divided into working surface and non-working surface. The working surface is shown in the figure. Approved by the Technical Supervision Bureau on December 22, 1994, and implemented on October 1, 1995
Y-shaped rubber seal
Diagram of rubber dustproof seal
Diagram of accumulator-shaped rubber seal
GB/T 15325--94
Mountain-shaped rubber seal
V-shaped rubber seal
Number-shaped rubber seal
Schematic diagram of the working surface of a typical reciprocating rubber seal, 6-working surface
3.3 Quality grade According to the appearance quality requirements of reciprocating rubber seals, they are divided into two grades: qualified products and first-class products. 4 Appearance quality
4.1 Rubber seals
4.1.1 Appearance quality of working surface The working surface should be flat and smooth, and no pores, impurities, cracks, bubbles, scratches, or axial flow marks are allowed. 4.1.2 Appearance quality of non-working surface The appearance defects and quality requirements of non-working surface are listed in Table 1. D in Table 1 is the outer diameter of the sealing cavity of the sealing ring. Its value and meaning are shown in GB/T10708. 15325-94
Appearance quality of non-working surface of rubber sealbZxz.net
Quality level
Height or depth, not more than, mm
Convex defect
Flow, butterfly mark
Diameter, not more than, mm
Not more than, places
Length, not more than, mm
Width, not more than, mtm
Height or depth, not more than, mm
Not more than, places
Length, not more than, mm
Width, not more than, mm
Height or depth, not more than, mm
Not more than, places
Length, not more than, mm
Width, not more than, mm
Height or depth, not more than, mm
Not more than, places
Length, not more than, mm
Width or depth, not more than, mm
Not more than, places
First 4 The cumulative defects shall not exceed, the height or width of the rubber edge shall not exceed, mm
The width of the rubber edge shall not exceed, mD)
The repair detection shall not exceed, mm
4.2 Fabric-strap rubber seal ring
4.2. 1 Appearance quality of working surface
Qualified products
63180mm
Qualified products
≥>180 mtn
Qualified products
Allowed to exist, but shall not exceed the cross-section specification
The working surface shall not be allowed to have broken wires, exposed fabric, delamination, bubbles, impurities, unevenness. For fabric-strap rubber seal rings with parting surfaces on the working surface
, the height, width and repair detection shall not exceed 0.2mm. The fabric layer at the mold corner is allowed to be uneven.
Appearance quality of non-working surface
Defect requirements
Defect name
The appearance defects and quality requirements of non-working surface are listed in Table 2. Table 2 Appearance quality of non-working surface of fabric rubber sealing ring D
Quality grade
Length, not more than, mm
Width, not more than, mm
Height or depth, not more than, mm
Not more than, places
Qualified product
63~180mm
Qualified product
>180mm
Qualified product
Defect requirements
Defect name
Length, not more than.mm
Concave and convex defects
Width, not more than, mm
GB/T 15325-94
Continued Table 2
Quality grade
Height or depth, not more than, mm
Not more than, places
First 2 The total amount of defects is not more than,
The height or depth of the glue edge is not more than,mt
The repair height is not more than,mm
The repair depth is not more than,mm
Joint marks
Angular defects
Article fold
4. 3 Rubber seal with gold skeleton
Qualified products
63~160mm
Qualified products
Allowed to exist, but shall not exceed the surface
Allowed to exist, but shall not have any folding
>180mm
Qualified products
First-class products
Corner depression shall not exceed one-tenth of the set depth, and the length shall not exceed one-fifth of the toilet length
Allowed to exist, but its depth shall not exceed 0.5m, and its length shall not exceed one-quarter of the circumference
4.3.1 Appearance quality of working surface Appearance quality requirements of working surface 4.1.14.3.2 Appearance quality of non-working surface
4.32.1 The appearance quality of the rubber part of the non-working surface shall meet the requirements of Table 1. 4.3-2.2 Rubber and metal shall not be separated. 4.3.2.3 For the inner metal-clad thick-frame seal, partial metal leakage is allowed, but the exposed area shall not exceed one-fifth of the area of the side surface where it is located. 4.3.2.4 For the outer metal-clad frame seal, the metal surface shall be smooth, free of rust and marks, and no burrs are allowed at the corners. 4.4 Pressure ring, support ring and retaining ring
4.4.1 The surface shall be uniform in color, smooth and flat, and no holes, patterns, fractures or burrs are allowed. 4.4.2 The surface is allowed to have bubbles with a diameter of less than 1mm, but the number shall not exceed 1 within 50 mm of the circumference. 4.4.3 The surface is not allowed to have axial flow and scratches. Flow and scratches are allowed to exist in the circular direction, but their depth shall not exceed 0.1 mm, their thickness shall not exceed 0.3 mm, and their length shall not exceed one-fifth of the circumference. 4.4.4 Other requirements shall be determined by negotiation between the supply and demand parties. Additional Notes:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Northwest Rubber Industry Products Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Northwest Rubber Products Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Yuan Li, Su Guirong, Wang Wenbo, Xu Xianzhang, Yin Junan. After the release and implementation of this standard, the original Ministry of Chemical Industry standard HG41568-85 Appearance Quality Standard for Rubber Parts of Comprehensive Mechanized Coal Mining Equipment will be abolished.
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