VB 130 W/ KNOB 6.6 @ 1850 Pacific Bay Equipment Sale! from $89.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Trapped Pressure Unloader for the 51 & 60 Series pumps.Fits CAT 2SF pumps as well as others. PSI Max: 2600 Temperature: 195°F 3/8" MPT Inlet and Outlet 3/8" FPT Bypass Stainless-Steel Plunger Stainless-Steel Valve Seat Weight: 14.7 oz. VB-135- with Knob, Banjo Connection, Hollow Screw Fitting