Orifice flow restrictor RI series

for metal housing

Insert style precision orifices are economical, reliable, highly accurate miniature flow restrictors designed for metal housings. Installation is simple using our field-proven controlled expansion principle, which provides retention and a leak-tight seal without threads, O-rings, or adhesive. Our standard precision orifices are available in 2.5 mm, 5.5 mm, and 8.0 mm body diameters and forward and reverse flow directions. All three sizes are available in liquid and gas configurations with a wide range of standard Lohm rates. Integral safety screens are incorporated where the orifice diameter is 0.5 mm (0.020 of an inch) or below. All orifices are 100% flow tested to ensure that every part is within ± 5% of its nominal flow rate. Tighter flow tolerances are available as specials. The 2.5mm Insert Orifice For Gases is the smallest, self-retained restrictor available, allowing designers to save space and weight. This orifice is 100% flow tested on nitrogen to ensure that every part is within ± 5% of its nominal flow rate. Tighter tolerances are available as specials. To further increase accuracy, orifices are tested in the direction of use. Constructed entirely of stainless steel the Insert Orifice is available in a wide range of Lohm rates. Integral safety screens are incorporated where the orifice diameter is 0.5mm (.020″) or below. Installation is simple using Lee’s field-proven controlled expansion principle which provides retention and creates a leak tight seal that prevents bypass leakage.