Hosco Stainless Steel Restrictors provide reliable, long life fluid flow control to an applicator. The family of products consists of recirculating and non-circulating versions that can be internally set (tamperproof) or externally adjusted even while dispensing. The long tapered needle design of the restrictors provide fine flow rate adjustments from complete shut off to over 1000 cc/min (depending on pressure and viscosity). Settings are repeatable from restrictor to restrictor station so set up is relatively easy. The internally set styles may require the RAB-6 Tool to provide initial set point adjustment while the restrictor is “on line”. The externally adjusted versions require an allen wrench for adjustment which is included with the restrictor.