The GD-10, GD-10F, and AF-10 are lightweight direct-acting diaphragm valves used primarily for pneumatic tool air supply and non-hazardous gas regulation. Screwed connections make it easy to support in position without external sensing lines or other parts. Zinc or aluminum bodies eliminate rust and scale. Plug, seat and diaphragm are renewable in-line, and you can make quick adjustments externally with a locking handle. A quarter-inch pressure gauge connection is standard, and all units are capable of tight shutoff for dead-end service.