The Howden screw compressor is the “Mercedes G-Wagon” of rotary screws: over-engineered, expensive to buy and fix, but nearly unstoppable when properly maintained. It’s not for everyone, but for critical process applications, it’s a justifiable investment.
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. howden screw compressor
First cost is your primary metric, or your application is light-duty (less than 4,000 hours/year). The Howden screw compressor is the “Mercedes G-Wagon”