IVBX

The IVB_X, VX series keep particles that are produced inside the chamber from rising. By controlling the integrated bypass valve before opening the main valve, it suppresses abrupt pressure fluctuation that occur when exhausting from atmosphere pressure to vacuum, or when going back from vacuum to atmosphere pressure. Fixed flow bypass valves and variable flow bypass valves are available. These bypass valves are compatible with all IVB, IVBL, and IVBH series valves except for the 15A size.

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FEATURES

They help achieve reduced cost and space saving by integrating the conventional slow bypass line to the main valve.
VX type bypass valve can change the conductance to reach optimal exhaust speed. Please refer to the table below for the adjustable range.
By selecting high temperature resistant materials, these bypass valves can be used with IVBH series vacuum isolation valves in heated condition.
Depending on the model of the vacuum isolation valve, multiple bypass valves can be attached. Please ask the sales representatives for details.

WETTED AREA MATERIAL

PCTFE, Fluorine rubber

PRECAUTIONS

The variable flow bypass valves have a structure that adjusts the lift of the bellows’ ON/OFF valve to control the flow; therefore the set amount of flow may vary according to your usage conditions.
The valves are designed to be used under atmospheric pressure. Usage such as under vacuum vessels are not guaranteed.
For high temperature applications, please select appropriate material for air-fittings and tubes to assure proper performance.

Product Selection

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Product Details

Specifications
Type	Fixed Flow Type NC				Variable Flow Type NC
Seat	Fluorine rubber		PCTFE		Fluorine rubber		PCTFE
Size	1/4"	1/2"	1/4"	1/2"	1/4"	1/2"	1/4"	1/2"
Cv	0.3	0.85	0.3	0.85	0.03~0.28	0.05~0.74	0.03~0.28	0.05~0.74
Valve Lift	0.039 (1.00)	0.059 (1.50)	0.039 (1.00)	0.059 (1.50)	0.039 (1.00)	0.059 (1.50)	0.039 (1.00)	0.059 (1.50)
Actuation Pressure	58~101 psig (0.4~0.7MPa (G))

PRODUCT CODE KEY

Model

Size

Main Valve Operation

Bypass Valve Operation

Bypass Valve Seat

Bypass Valve Size

Valve Shape

Main Valve Connection (Seat Side)

Main Valve Connection

Main Valve Seat

Custom Specifications

Accessories

RoHS

IVB

Specific Code

(RS)

IVB - Square Shaped Bellows Valve
IVBL - Round Shaped Bellows Valve
IVBH - Bellows Seal Hot Valve

25: 25A
40: 40A
50: 50A
65S: 65A
80S: 80A
100S: 100A

Not Shown: Normally Closed
D: Double Acting
O: Normally Open

VX: Variable Flow
X: Fixed Flow

Not Shown: PCTFE
F: Fluorine Rubber

Not Shown: 1/4" Size
8: 1/2" Size

A: Angle Type
Y: Y-Shape Straight

NW: ISO KF Flange
VF: JIS VF Flange
VG: JIS VG Fange
CF: ConFlat Flange
MF: ISO MF Flange

Not Shown: Cases Same As Seat Side Are Omitted.
F: JIS VF Flange
G: JIS VG Flange

F: Fluorine Rubber

Not Shown: Standard Products Are Omitted

Not Shown: No Switch
SO: With Switch On the Open Position
SC: With Switch On the Closed Position
W: With Open and Closed Position
*1

Not Shown: With PD31L3 Switch
PE: With PE33L3 Switch

Not Shown: Not RoHS Compliant
(RS): RoHS Compliant Product