QV Vacuum Breaker

QV-Vacuum Breaker

Description of Valve Operation

A compact, quick acting, sanitary major vacuum breaker for eliminating air from processing lines. It offers two-way passage of air flow until the line is pressurized, then the plug rises and closes the valve. When depressurized, the plug drops, which allows air back into the system, draining the line of liquid


  • Easy to clean and assemble
  • All 316 stainless steel
  • Positive sealing with negligible spitting
  • Both the QV and QVO have the same action.
  • The QVO with its O-ring seal is designed for hot, crusting liquids and abusive environments where the QV’s metal-to-metal seat may be damaged.


HTST Pasteurization - for protection of heat generators against siphon drainage; Vacuum Pasteurization - preventing exposure of flow diversion valves to downstream vacuum;


  1. Siphon prevention.
  2. Venting air from liquid lines and allowing lines to drain.


These valves work reliably when used in milk processing lines. Milk fats serve as lubricants for the valves. For products not containing natural lubricants, approved lubricants may be used. If using a QVO valve, try teflon coated Buna-N or Viton O-rings.


  1. Due to varying conditions of each system, every Q-Control valve should be tested in place before being relied upon for protection during operation.
  2. Information presented is general and may not apply to the conditions of individual installation.
  3. The manufacturer’s warranty relates to workmanship, sanitary requirements, and action as tested when shipped. Any liability cannot exceed the price of the valve.

Valve Specification

Line Size 1 1/2" 2" 2 1/2"
Valve Height 1-11/16" 1 - 7/8" 1 - 7/8"
Q-Seat Diameter 3/4" 1-1/4" 1-1/4"
Orifice Diameter - Equiv. Net Air Flow 3/16" 11/32" 11/32"


Part No. TriClamp Valves Part No Bevel Seat Valves
15QVTC 1.5" QV-TriClamp 15QVBS 1.5" QV-Bevel Seat
15QVOTC 1.5" QVO-TriClamp 1 15QVOBS 1.5" QVO-Bevel Seat
20QVTC 2" QV-TriClamp 20QVBS 2" QV-Bevel Seat
20QVOTC 2" QVO-TriClamp 20QVOBS 2" QVO-Bevel Seat
25QVTC 2.5" QV-TriClamp 25QVBS 2.5" QV-Bevel Seat
25QVOTC 2.5" QVO-TriClamp 25QVOBS 2.5" QVO-Bevel Seat

Individual Parts

Item Part No. Description Material
  QV15BDT 1.5" QV Body - TriClamp 316SS
  QV15BDB 1.5" QV Body - Bevel Seat 316SS
  QV15PL 1.5" QV Plug 316SS
  QV15PL 1.5" QVO Plug 316SS
  OR113B 1.5" O-ring Buna-N
  OR113TC 1.5" O-ring -Teflon Coated Buna-N
  OR113V 1.5" O-ring Viton
1* QV20BDT 2" QV Body - TriClamp 316SS
  QV20BDB 2" QV Body - Bevel Seat 316SS
2* QV20PL 2" QV Plug 316SS
3 QVO20PL 2" QVO Plug 316SS
4 OR214B 2" O-ring Buna-N
  OR214TC 2" O-ring - Teflon Coated


  OR214V 2" O-ring


  QV25AT Adapter, 2" to 21/2" Line, TriClamp end


  QV25AB Adapter, 2" to 21/2" Line, Bevel Seat end