Garlock 9900 Gaskets
Garlock 9900 Gaskets.
A carbon fibre gasket sheet with an NBR binder, rated to 343°C continuous and 138 bar for steam, water, oils, fuels and inert gases.
|
Material |
Carbon fibres with NBR binder, asbestos-free |
|
Colour |
Mahogany |
|
Fluid services |
Saturated steam, water, oils, inert gases, aliphatic hydrocarbons and gasoline |
|
Temperature range |
-75°C to +343°C continuous, +537°C absolute maximum |
|
Maximum pressure |
138 bar |
|
P × T (max.) |
25,000 bar × °C (1/32″ and 1/16″) / 12,000 bar × °C (1/8″) |
|
Compressibility (ASTM F36) |
9% average |
|
Recovery (ASTM F36) |
55% |
|
Creep relaxation (ASTM F38) |
9% |
|
Tensile strength, across grain (ASTM D1708) |
12 N/mm² |
|
Density (ASTM F1315) |
1.76 g/cm³ |
|
Thermal conductivity (ASTM F433) |
0.87 W/m·K |
|
Design factors (ASTM F586) |
m = 4.5 (1/16″ and under) / 5 (1/8″); y = 28.3 N/mm² |
|
Leakage, Fuel A (ASTM F37B) |
0.30 ml/hr at 3.5 N/mm² gasket load |
|
Leakage, nitrogen (ASTM F37B) |
0.6 ml/hr at 20.7 N/mm² gasket load |
|
Leakage, nitrogen (DIN 3535) |
0.015 cc/min at 32 N/mm² gasket load and 40 bar |
|
Preferred assembly stress |
41 to 69 N/mm² |
|
Specifications met |
ABS, STR 508(5) Rev. 2 and fire safe |
Every gasket is cut to order, from single prototypes through to full production runs. Send us your drawing or dimensions and we will come back with a quotation.
Why choose Garlock 9900 for high pressure steam and oil service?
Garlock 9900 is made from carbon fibres held in an NBR binder, and it’s asbestos free. The nitrile binder is what sets it apart from the 9800, which uses SBR, because it brings oils, aliphatic hydrocarbons and gasoline into the service range alongside saturated steam, water and inert gases. The continuous maximum temperature is 343°C, with an absolute maximum of 537°C, and the pressure limit is 138 bar. The minimum temperature rating is -75°C, which the data sheet describes as conservative.
Its physical figures suggest a gasket that stays tight. Creep relaxation is only 9%, so almost all of the bolt load is retained over time, and compressibility averages 9% with 55% recovery. Tensile strength across the grain is 12 N/mm². Leakage testing was also low, at 0.30 ml/hr with Fuel A and 0.015 cc/min with nitrogen under DIN 3535. The sheet meets ABS (American Bureau of Shipping) specifications and STR 508(5) Rev. 2, and it’s listed as fire safe.
Thickness and assembly both affect the working limits. The maximum pressure × temperature rating is 25,000 bar × °C for 1/32″ and 1/16″ sheet and falls to 12,000 bar × °C for 1/8″ sheet, and 1/16″ is strongly preferred. For assembly, the sheet recommends a minimum stress of about 33 N/mm² (4,800 psi), with 41 to 69 N/mm² (6,000 to 10,000 psi) preferred, and the bolts or studs should be re-torqued before the joint is pressurised.
For further information on our services or to discuss your requirements, contact us today.
