304 Stainless Steel Automatic Counterweight Exhaust Rain Cap Clamp-on Exhaust Flapper for Heavy-Duty Diesel Machinery

This SUS304 stainless steel automatic counterweight exhaust flapper rain cap is engineered for vertical exhaust stacks of heavy-duty diesel equipment. It combines a precision counterbalance mechanism with genuine 304 stainless steel construction to deliver reliable rain, dust, and debris protection while maintaining unobstructed exhaust flow.

This automatic exhaust flapper rain cap is widely used on large farm tractors, combine harvesters, excavators, wheel loaders, bulldozers, heavy-duty trucks, diesel generators, and other off-road heavy machinery.

It is ideal for farmlands, construction sites, mining yards, logistics yards, and other harsh outdoor working environments. As an essential exhaust stack accessory, it protects diesel engine exhaust systems during long periods of outdoor parking.

1. Efficient Counterbalance Design — The optimized counterweight structure opens instantly under exhaust pressure when the engine starts, allowing unobstructed gas discharge. It closes automatically and tightly by gravity once the engine shuts down, achieving a perfect balance between exhaust performance and rain sealing.
2. Genuine SUS304 Stainless Steel Construction — Solid 304 stainless steel offers excellent rust and corrosion resistance. It resists salt spray, rain, mud, and fertilizer corrosion, making it ideal for coastal and high-humidity working sites.
3. Secure Clamp-on Mounting Bracket — The adjustable heavy-duty clamp fits easily onto standard vertical exhaust stacks. Quick installation requires no welding, and the stable mounting withstands strong vibration and wind.

This 304 stainless steel exhaust rain cap is engineered for vertical exhaust stacks of heavy-duty diesel-powered equipment. It fits a wide range of large farm tractors, combine harvesters, excavators, wheel loaders, bulldozers, heavy-duty semi-trucks, off-road machinery, and stationary diesel generators.

It is well suited to farmlands, construction zones, mining sites, coastal yards, and other harsh outdoor environments. The cap protects mufflers and engine cylinders from rain, snow, dust, leaves, and debris intrusion during idle periods and long-term parking.

Shijiazhuang Woodoo Trade Co., Ltd. is an experienced exporter established in 2013. We mainly supply hardware, metal fittings, heavy machinery exhaust rain caps, auto and agricultural machinery spare parts, valves, pumps, and rubber and plastic products.

We support OEM & ODM and provide full export services for customers worldwide. Quality control and on-time delivery are our core advantages.