Hot-gas and hot-blast gaskets

Hot-gas and hot-blast gaskets

Proven for years in the metallurgical industry

Hot-gas and hot-blast gaskets

Hot-gas and hot-blast gaskets Kempchen’s hot-gas and hot-blast gaskets have proven themselves over many years of use in the iron and steel industry.

Hot-gas and hot-blast gaskets are primarily used with dry gases and with high, dry heat. They are very suitable for the harsh conditions in hot-gas and hot-blast lines which also generally have low pressure.
Depending on the leaktightness required and the flange temperature, there are a number of models available.

Most gaskets can withstand the demands made of a gasket when used in hot-gas or hot-blast lines. The gaskets can withstand high temperatures, are non-flammable and chemically resistant against dry, hot gases. They are used at high temperatures and at pressures of up to 10 bars.

Gaskets with graphite inlays can be used at temperatures up to 550 °C. The gaskets are available as circular or oval sealing rings or as frames. In their standard form they consist of a 3 mm thick core of unalloyed steel and a coating of fibreglass impregnated with graphite.

We can produce frame gaskets with welded plates or in some cases with holes directly from client drawings. If requested, we can also supply these gaskets with a different steel core, for example 1.4541 or 1.5414.

ProfileCross-sectionDescription
WAGThe WAG Profile consists of a steel ring with two U-shaped fibreglass envelope. The first (inner) envelope has an opening facing outwards, the second (outer) envelope has an opening facing inwards. This design helps to prevent the casing being ripped off when fitted in difficult conditions, by packing the gasket into a narrow sealing gap. The gaskets are generally impregnated.
W2AMIn Profile W2AM gaskets, the inner steel ring is layered with corrugated gaskets with graphite layers and then coated with fibreglass. The gaskets are generally impregnated.
B7M-F-CKPProfile B7M-F1-CKP gaskets consist of a grooved gasket coated with fibreglass and an inner eyelet and are impregnated with CKP. This design produces comparatively thin gaskets. These gaskets fulfil the need for a fast compression set, particularly when fitting flanges with hydraulic or pneumatic screwing tools or even by hydraulic tension (bolt tensioning). The gasket is certified in accordance with TA Luft and ca be used with other smelting gases. Corrugated and metal jacketed gaskets can also be used for hot-gas applications.
Profiles   Steel & fibreglassfibreglass & fibreglass
WAGRecommended max. roughness of the flange surfacesµmvon50 
bis100 
Surface pressure limits for 20 °CN/mm²σv45 
σϑ120 
Surface pressure limits for 300 °CN/mm²ơσv60 
σϑ100 
W2AMRecommended max. roughness of the flange surfacesµmvon 50
bis 100
Surface pressure limits for 20 °CN/mm²σv 45
σϑ 150
Surface pressure limits for 300 °CN/mm²ơσv 60
σϑ 125
B7M-F1-CKPRecommended max. roughness of the flange surfacesµmvon50 
bis100 
Surface pressure limits for 20 °CN/mm²σv30 
σϑ350 
Surface pressure limits for 300 °CN/mm²ơσv25 
σϑ210