Welmech Engineering Company [Pvt.] Ltd. Manufactures Electrical and Gas Rotary Retort Furnace suited for Small Parts. Welmech Engineering Company [Pvt.] Ltd. Is an ISO 9001 certified company. This machine delivers continuous operation and features controlled atmosphere facility. It features programmable operation with the nominal capacity 50 to 300 kg / hr. Electrical and Gas Rotary Retort Furnace suited for small parts come with the following features: