Advanced Search by Product Number
Find My Check Valve
  • Vacuum Breaker Threaded In-Line Check Valves
DFT® Vacuum Breakers provide effective protection against collapse of pressure vessels, tanks and rolls. They prevent condensate "back-up" when equipment is shut down or inlet steam is reduced by modulating control valves. In piping systems, DFT® 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.

Standard Features:
  • 1" to 4" Size (Outside Diameter)
  • 450 to 6000 CWP
  • Threaded O.D. (MNPT)
  • Unthreaded Inlet Bore
  • Stainless Steel Construction
  • Spring-Assisted Silent Closing
  • Horizontal or Vertical Installation
  • Tight Shutoff - Lapped Disc & Seat
  • Easy Maintenance
  • Versatile
1 - 13 of 13 | Results Per Page | View | Unit of Measure
1 
Request Information Compare Items
Clear Filter

Size (in)

Size (mm)

ASME CWP

Style

Seat

ENDS

Prod. #

Inventory

Size

Nominal Size (MNPT) A

Unthreaded Inlet Bore B

Style

Valve Cracking Pressure

Cold Working Pressure

Seat

Inventory

Rfi_link

List Price

N/A
{0} 		N/A 1 in25 mm N/A 1.00 in N/A 0.56 in14 mm N/A BSSV6 N/A 0.6 psi0.041 bar16.7 in.water424 mm.water31.1 mmHg N/A 0 psig6000 psig0 barg414 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 1 in25 mm N/A 1.00 in N/A 0.56 in14 mm N/A BSSV N/A 0.24 psi0.017 bar6.6 in.water167 mm.water12.4 mmHg N/A 0 psig2500 psig0 barg172 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 1 in25 mm N/A 1.00 in N/A 0.56 in14 mm N/A BSSV N/A 0.6 psi0.041 bar16.7 in.water424 mm.water31.1 mmHg N/A 0 psig2500 psig0 barg172 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 1.5 in40 mm N/A 1.50 in N/A 0.88 in22 mm N/A BSSV N/A 0.44 psi0.03 bar12.1 in.water307 mm.water22.6 mmHg N/A 0 psig2000 psig0 barg138 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 1.5 in40 mm N/A 1.50 in N/A 0.88 in22 mm N/A BSSV6 N/A 0.44 psi0.03 bar12.1 in.water307 mm.water22.6 mmHg N/A 0 psig5500 psig0 barg379 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 2 in50 mm N/A 2.00 in N/A 1.09 in28 mm N/A BSSV N/A 0.36 psi0.025 bar10.1 in.water257 mm.water18.8 mmHg N/A 0 psig1500 psig0 barg103 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 2 in50 mm N/A 2.00 in N/A 1.09 in28 mm N/A BSSV6 N/A 0.36 psi0.025 bar10.1 in.water257 mm.water18.8 mmHg N/A 0 psig3000 psig0 barg207 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 2.5 in65 mm N/A 2.50 in N/A 1.50 in38 mm N/A BSSV N/A 0.16 psi0.011 bar4.5 in.water114 mm.water8.4 mmHg N/A 0 psig850 psig0 barg58.6 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 2.5 in65 mm N/A 2.50 in N/A 1.50 in38 mm N/A BSSV6 N/A 0.16 psi0.011 bar4.5 in.water114 mm.water8.4 mmHg N/A 0 psig1100 psig0 barg75.8 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 3 in80 mm N/A 3.00 in N/A 1.72 in44 mm N/A BSSV6 N/A 0.15 psi0.01 bar4.2 in.water107 mm.water7.8 mmHg N/A 0 psig900 psig0 barg62.1 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 3 in80 mm N/A 3.00 in N/A 1.72 in44 mm N/A BSSV N/A 0.15 psi0.01 bar4.2 in.water107 mm.water7.8 mmHg N/A 0 psig700 psig0 barg48.3 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 4 in100 mm N/A 4.00 in N/A 2.22 in56 mm N/A BSSV6 N/A 0.1 psi0.007 bar2.6 in.water66 mm.water4.8 mmHg N/A 0 psig450 psig0 barg31.0 barg N/A 316 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
N/A
{0} 		N/A 4 in100 mm N/A 4.00 in N/A 2.22 in56 mm N/A BSSV N/A 0.1 psi0.007 bar2.6 in.water66 mm.water4.8 mmHg N/A 0 psig450 psig0 barg31.0 barg N/A 303 SS N/A =CASE WHEN {Inventory}=0 THEN {Rfi_link} ELSE CONVERT(VARCHAR(255),{Inventory}) END= {QUOTE}
1 - 13 of 13 | Results Per Page | View | Unit of Measure
1