The slide valve and stepless capacity control are smooth. From 100% down to 25% load, the compressor maintains stable discharge pressure without surging. The Vi (volume ratio) adjustment is also effective for varying suction pressures.
Unlike many competitors, Howden screw compressors handle dirty or corrosive gases well (with proper materials selection). We’ve compressed hydrocarbon mixtures with liquid carryover and minor particulates without rotor seizure. The robust bearings (SKF/FAG) are designed for thrust loads common in gas duty. howden screw compressor
Oil-injected Howdens require strict oil quality (typically synthetic, ISO VG 68–100). Using non-approved oil degrades performance and voids the warranty. The oil separator elements are effective but expensive ($800–$1,500 each). The slide valve and stepless capacity control are smooth
While service intervals are long, when something breaks, parts are expensive. A set of main bearings can cost $3,000–$5,000, and an OEM rotor replacement is nearly the cost of a new unit. Additionally, servicing requires specialized tooling and Howden-trained technicians—local general mechanics cannot handle it. While service intervals are long