Durabla Vacuum Breakers In Stock

Manufacturer:
Durabla
Description:

DFT Durabla Vacuum Breakers provide effective protection
against collapse of pressure vessels, tanks and rolls.
They Prefent condensate "back-up" when equipment is
shut down or inlet steam is reduced by modulating    
control valves.  In piping systems, DFT Durabla Vacuum Breakers
are used to break siphons, prevent pipe collapse during
transient pressure drops, and to provide addition of air 
on the downstream side of check valves to dampen
water hammer.

 

Features:

  • 1" - 4" Size
  • 450 - 600 CWP
  • Threaded O.D. (MNPT)
  • Unthreaded Inlet Bore
  • Stainless Steel Construction
  • Spring-assisted Silent Closing
  • Horizontal or Vertical Installation
  • Tight Shut-Off
  • Soft Seat Option
  • Easy Maintenance
  • Versatile
Item Name: DFT Vacuum Breakers
Description:

Cracking pressure for vertical flow will be slightly different: upward flow, slightly higher; downward flow, slightly less.  

*(1) - Light spring available: Cracking Pressure = .18 PSI (5.0 inches of water)

*(2) 0.24 PSI Crack Pressure Spring (+/- 10%)

Lead Time: Most sizes IN STOCK at factory. Ready for quick-ship.
Specifications
Durabla Model Size Nominal Size
(MNPT) A
Unthreaded Inlet
Bore B
Weight Product Number Price  
BSSV 1" 1" .56" (14mm) 2.00 8033 $72.75 Add to RFQ
BSSV 1" 1" .56" (14mm) 2.00 8103 $72.75 Add to RFQ
BSSV 1-1/2" 1-1/2" .88 (22mm) 2.00 8034 $126.95 Add to RFQ
BSSV 2" 2" 1.09" (28mm) 3.00 8035 $155.25 Add to RFQ
BSSV 2-1/2" 2-1/2" 1-1/2" (38mm) 4.00 8036 $209.25 Add to RFQ
BSSV 3" 3" 1.72" (44 mm) 6.00 8037 $290.50 Add to RFQ
BSSV 4" 4" 2.22" (56 mm) 9.00 8038 $450.50 Add to RFQ
BSSV6 1 1" 0.56" (14 mm) 2.00 8094 $114.50 Add to RFQ
BSSV6 1-1/2 1-1/2" 0.88" (22 mm) 3.00 8095 $148.95 Add to RFQ
BSSV6 2 2" 1.09" (28 mm) 3.00 8096 $200.75 Add to RFQ
BSSV6 2-1/2 2-1/2" 1-1/2" (38 mm) 4.00 8097 $269.75 Add to RFQ
BSSV6 3 3" 1.72" (44 mm) 6.00 8098 $331.25 Add to RFQ
BSSV6 4 4" 2.22" (56 mm) 9.00 8099 $512.00 Add to RFQ
Technical Information
CV Friction Loss
(Feet of Pipe)
Valve Cracking Pressure*
(PSI)
Valve Cracking Pressure*
(Inches of Water)
5.8 7 0.60(1) 16.7
13.2 6 0.45 12.5
23.1 7 0.38 10.5
36 12.5 0.20 5.5
57.4 11 0.14 3.9
90 16 0.15 4.3
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