Lock speed setting, with the touch of a button It can be locked only by pushing the handle after adjustment. Convenient opening indication scale The opening indication scale for the needle valve is provided on the handle to facilitate speed adjustments. Easy speed control at low flow volume ranges Possible to control the mass velocity Constant handle constructed of metal to withstand heavy usage In addition to the standard handle made of resin, a heavy-duty metal handle is also available. Retainer prevents an accidental loss of needle
