The EHD9000 is a premium, heavy-duty surface door closer. Its rugged, single-piece cast iron construction stands up to heavy traffic and changing weather. It features a front-facing springsize indicator and adjustment points to ensure that the appropriate settings are installed for the application. Once installed, all adjustments can be made on the front. Self-regulating valves inside the EHD9000 door body control oil movement when temperatures fluctuate or valves don’t self-loosen in heavy use applications. A dual-clamp design ensures the cover is strongly secured on both ends to reduce the chance of breakage or dislocation.