3″ Outside Screw & Yoke Hydrolet QRB Valve – 45 Degree Elbow

This valve has the same features as our standard Q.R.B. but with the added advantage of having an outside screw and yoke which isolates the threads of the stem from the product being hauled. The Betts Q.R.B. Hydrolet Valve with the exclusive quick-removable bonnet, is designed for use on transport tanks hauling a variety of products, where easy dismantling for cleaning and inspection is essential. The valve is available in flanged or threaded outlets. The valve is constructed of 316 stainless for compatibility with a wide range of products.

Pressure and Temperature Rating:

  • Max working pressure (MAWP): 35 psi [2.4 bar]
  • Max temperature (dependent on seal):
  • PTFE, FKM or Non-Asbestos: 400°F [204°C]
  • Nitrile (Buna-N): 230°F [110°C]


Product Details

Assembly NumberDimensionsFlange-Inlet & OutletOutlet Wt.
QY763SST F: 6 1/4" [159 mm]
G: 6 25/32" [172 mm]
I.D.: 3 3/8" [86 mm]
B.C.: 4 7/8" [124 mm]
Holes: 8-7/16" [11 mm]
Flanged16 lbs (7.3 kg)
QY773SST E: 6 9/16" [167 mm]
H: 7" [178 mm]
I.D.: 3 3/8" [86 mm]
B.C.: 4 7/8" [124 mm]
Holes: 8-7/16" [11 mm]
3" Threaded14.8 lbs (6.7 kg)
NOTE: Stainless 316 valves are standard with PTFE disc, gasket & packing (Suffix "T"). For variations and replacement parts see section 10, Page 5B.

Repair Kits and Accessories

Teflon Accordion Packing

Engineering Bulletins

EB-03-18: Procedure for Pneumatic Leak Test of Hydrolet Valve (Pre-Load Qualification)
EB-09-99: Q.R.B. Hydrolet Clamp Ring Installation and Torque Rating.
EB-08-99: Important Safety Instruction – Outside Screw & Yoke (OS&Y) Hydrolet Valve