Prod. # 8033, 1" 303 SS BSSV Style Vacuum Breaker Threaded In-Line Check Valve On DFT Inc.



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All Categories > IN LINE CHECK VALVES > Threaded Check Valves > Vacuum Breaker Threaded In-Line Check Valves > Prod. # 8033


	Prod. # 8033, 1" 303 SS BSSV Style Vacuum Breaker Threaded In-Line Check Valve

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.

Vacuum Breaker Threaded In-Line Check Valves

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Vacuum Breaker Threaded In-Line Check Valves-2

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Specifications · Materials of Construction · Soft Seat Materials · Springs · Valve Selection Specifications · Codes and Standards · Features · Options

Specifications

Series

Vacuum Breaker

Style

BSSV

Size

DN 25
1 in

Nominal Size (MNPT) A

1.00 in

Unthreaded Inlet Bore B

0.56 in
14 mm

Cv

5.8

Friction Loss (Feet of Pipe)

Friction Loss (Meter of Pipe)

2.1

Valve Cracking Pressure¹

0.60 psi
0.041 bar
16.7 in.water
424 mm.water
31.1 mmHg

Valve Cracking Pressure Tolerance

±10%

Approx. Net Weight Each

0.38 lb
0.2 kg

Cold Working Pressure²

0 psig
2500 psig
0 barg
172 barg

¹ Cracking pressure for vertical flow will be slightly different: upward flow, slightly higher; downward flow, slightly less.
² Contingent on service ratings of matching pipe and fittings.

Materials of Construction

Seat		303 SS

Disc		316 SS

Guard		303 SS

Spring		316 SS

Retaining Ring		316 SS

Soft Seat Materials

Soft Seat Materials¹

Buna-N (-70 to 250°F)
EPDM (-75 to 300°F)
TFE®-Viton (-40 to 400°F)
Viton® (-40 to 400°F)
Zelon® (37 to 400°F)

¹ Buna-N and Viton are not suitable for steam service.

Springs

Springs		Inconel® X-750 (-460 to 700°F) 316 SS (-460 to 450°F)

Valve Selection Specifications

ENDS		NPT

ASME		2500 CWP

Materials		303 SS

Codes and Standards

ANSI		B1.20.1

MSS		SP-25

Options		Inconel® 750 Spring Soft Seat

Features

1" to 4" size
450 to 6000 CWP
Threaded O.D. (MNPT)
Unthreaded inlet bore
Stainless Steel Construction
Spring-assisted silent closing
Horizontal or vertical installation
Tight shut-off - lapped disc & seat
Easy maintenance
Versatile

Options

Inconel® 750 Spring
Soft seat

MORE IMAGES


	· Saturated Steam Pressure

DOWNLOADS


		Cut Sheet (Vacuum Breaker Threaded In-Line Check Valves) (PDF, 96KB)

		Water Hammer (PDF, 29KB)

		Features (PDF, 28KB)

		NACE (PDF, 29KB)

		Pressure Temperature Rating (PDF, 58KB)

		Applications (PDF, 28KB)

		Technical Information (PDF, 43KB)

		Zelon Technical Information (PDF, 34KB)

		Design Flexibility eBook

CHECK VALVE RFQ



	Non-Slam Check Valve RFQ

8003-RK



	8003-RK Repair Kits

DFT® Inc.
140 Sheree Blvd. | PO Box 566 | Exton, PA 19341-0566

Toll Free: 1.800.206.4013
Phone: 610.363.8903 | FAX 610.524.9242

Email us at: dft@dft-valves.com

Prod. # 8033, 1" 303 SS BSSV Style Vacuum Breaker Threaded In-Line Check Valve

Series

Style

Size

Nominal Size (MNPT) A

Unthreaded Inlet Bore B

Cv

Friction Loss (Feet of Pipe)

Friction Loss (Meter of Pipe)

Valve Cracking Pressure1

Valve Cracking Pressure Tolerance

Approx. Net Weight Each

Cold Working Pressure2

Seat

Disc

Guard

Spring

Retaining Ring

Soft Seat Materials1

Springs

ENDS

ASME

Materials

ANSI

MSS

Options

Valve Cracking Pressure¹

Cold Working Pressure²

Soft Seat Materials¹