Howden Screw Compressor [repack] Info

Compared to older screw compressors, the Howden delivered a 12-15% reduction in specific power (kW per CFM). The asymmetric rotor profile minimizes blow-hole losses. For a 500 kW motor, this saves roughly $15,000–$20,000 annually in electricity.

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. 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). Compared to older screw compressors, the Howden delivered

The cast-iron casing makes these compressors significantly heavier than rotary vane or scroll alternatives. For mobile or space-constrained installations (e.g., offshore platforms), this is a real issue. While service intervals are long, when something breaks,

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.

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.