Profile: Trelan Manufacturing is a manufacturer of heavy industrial chippers. Our patented design allows the anvil to be mounted in a horizontal fashion, and also tends to draw the material being chipped toward the center of the chipper disc. We fabricate our own parts at our factory. Our Trelan model 21-L chipper is an ideal machine for land clearing contractors as well as wood chip producers. Trelan model 23-L chippers are equipped with roomy, deluxe cabs including heat/AC, a fully adjustable seat with joystick controls and eye relaxing tinted glass. We also offer replacement parts and technical support service.