4″ Hydrolet QRB Valve – Straight Outlet

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 the three styles shown below in 3” and 4” sizes with 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 upon packing, gasket & disc material specified:
    • PTFE, FKM or Non-Asbestos: 400°F [204°C]
    • Nitrile: 230°F [110°C]

 

PARTS LIST

Product Details

Assembly NumberDimensionsFlange-Inlet & OutletOutlet Wt.
QR724SST A: 15 3/8" [391 mm]
C: 5" [127 mm]
D: 4 5/16" [110 mm]
I.D.: 4 3/8" [111 mm]
B.C.: 5 7/8" [149 mm]
Holes: 8-7/16" [11 mm]
Flanged19.8 lbs (9 kg)
QR734SST A: 15 3/8" [391 mm]
B: 6 7/16" [164 mm]
D: 4 5/16" [110 mm]
I.D.: 4 3/8" [111 mm]
B.C.: 5 7/8" [149 mm]
Holes: 8-7/16" [11 mm]
4" Threaded19.8 lbs (9 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.