Continuous Pusher Furnace Manufacturer in India: Learn more about Pusher Furnace, it's specifications & features and why choose Therelek for a Continuous Pusher Furnace. Due to the high temperatures involved most of these furnaces operate under controlled and protective atmospheres, with inert gases such as nitrogen and argon used for initial purging, and gas mixtures or gases like cracked ammonia or hydrogen or endogas used to create a suitable atmosphere as per process parameters.