Paronite PMB-1
Paronite PMB-1 (oil and petrol resistant paronite) GOST 481-80
Oil and petrol resistant paronite (grade PMB-1) is produced in the form of sheets in accordance with GOST 481-80 and is intended for the manufacture of gaskets that seal detachable joints of various mechanisms. Oil-resistant paronite PMB-1 is produced in sheets with a thickness of 0.3 to 3.0 mm with dimensions in plan from 400x400 mm to 1000x850 mm. It is efficient in any climatic conditions. For operation in tropical climates, fungicides are used in the production of paronite.
If dimensions allow, then a gasket made of PMB brand paronite is cut from one solid sheet. If a gasket of large dimensions (exceeding the dimensions of the sheet) is required, it is allowed to manufacture gaskets from paronite in parts, by means of an adhesive connection.
Areas of application of paronite PMB-1
|
Environment |
Max pressure, MPa |
Operating temperature range, °C |
Type of sealed connection |
Equipment types |
|
Oil fractions, heavy and light oil products |
16,0 |
-40…+250 |
Thorn-groove, trough-protrusion connections; it is possible to seal "smooth" joints at pressures up to 2.5 MPa |
Pumps, containers, machinery, pipelines, compressors, internal combustion engines, etc. |
|
VPS Liquid |
16,0 |
-40…+100 |
||
|
Seawater |
10,0 |
-2…+50 |
||
|
Coolants, grades 12, 22, 114V-2 |
2,5 |
-50…+150 |
The recommended roughness parameter of the sealed surfaces is no more than Rz 40 microns.
Physical and mechanical parameters of PMB-1
|
Parameter name |
Value |
|
|
Specific weight, g/cm3 |
1,5…2,0 |
|
|
Conditional tensile strength (when force applied in the transverse direction), MPa |
20,0 |
|
|
Increase in mass after 5 hours in: |
|
|
|
Compressive deformation (35 MPa),% |
2-12 |
|
|
Recoverability after removing the compressive load (35 MPa), %, not less than |
30 |
|
|
OPERATING ENVIRONMENT |
T, °C |
P, MPa |
|
Sea water |
50 |
4 |
|
Brines |
60 |
10 |
|
Ammonia, liquid and gaseous |
110 |
2,5 |
|
Coke oven gas |
490 |
6,4 |
|
Air |
150 |
1,6 |
|
Oxygen and liquid nitrogen |
-182 |
0,25 |
|
Oxygen and gaseous nitrogen |
150 |
5 |
|
Liquefied and gaseous hydrocarbons |
60 |
2 |
|
Melt wax |
150 |
1 |
|
Light oil products (gaysol, reflux, gasoline, kerosene) |
200 |
2,5 |
|
Heavy and light oil products (diesel fuel, fuel oil, paraffin, tar, asphalt, bitumen) |
300 |
2 |
|
Oil fractions (diesel, automotive, aviation, industrial, turbine, transformer oils) |
150 |
2,5 |
|
Compressibility at 35 MPa |
5–16% |
|
|
Recoverability after 35 MPa |
40% |
|
|
Density |
1,5–2,0 g/cm3 |
|
Acceptance and storage
The paronite is oil and petrol resistant and products from it are accepted in batches. Each batch in the amount of 100% is subjected to visual quality control, and selectively - for compliance with the physical and mechanical characteristics established by the interstate standard 481-80. Each batch is accompanied by a paronite certificate and a marking label.
Paronite and paronite products should be stored in closed, ventilated and heated rooms, preferably in their original packaging. Storage on shelves and racks is allowed, at a height of at least one meter from the ground. Deformations during storage are not permissible. Storage conditions: relative air humidity - no more than 65%; ambient temperature - up to + 35 ° C. Storage at temperatures below 0 ° C is allowed. At the same time, before cutting the paronite and the manufacture of sealing gaskets, the material must be kept for 24 hours at a temperature of + 20 ° C.
During storage, avoid exposing the material to direct sunlight, liquids and vapors that can destroy rubber. The minimum distance to heating devices is one meter. Paronite should not be stored near ozone generating equipment.
Manufacturer's warranty
Subject to the conditions of transportation and storage in accordance with the requirements of State Standard 481-80, the manufacturer's guaranteed shelf life for oil and petrol resistant paronite grade PMB-1 and products made from it is two years from the date of issue.