Toggle, Stem & Cartridge Styles. The GV series valves offer 10 times more flow than the MAV series and 2.5 times the flow of the MJV series. With Clippard s versatile 15/32-32 nose thread, a large variety of buttons and valve actuators can be used with the stem operated valves. The GTV series are toggle valves with panel mounting capabilities (5/8-32 nose thread). The outlet port on all GV valves can be easily positioned to any orientation for mounting convenience