VAT, Inc. Soft Start Valve Series 311

Description
Soft-start valves consist of two halves of throttle flaps supported on a common axis and maintained in the open position by a spring. The axis is held in an ISO-KF centering ring that is formed as a body with valve seat. When mounting them between two ISO-KF flanges (instead of a centering ring), the open flaps must be orientated against the air flow in the vacuum line. When the roughing system goes into operation, a strong air flow occurs in the roughing line, which immediately closes the valve and reduces the pipe section by about 99%. When reaching a differental pressure of approx. 15 mbar, the valve opens and leaves the pipe sectionnearly unobstructed for further pumping.
  • Soft Start Valve - Series 311 - VAT, Inc.
    VAT, Inc.
Description
Soft-start valves consist of two halves of throttle flaps supported on a common axis and maintained in the open position by a spring. The axis is held in an ISO-KF centering ring that is formed as a body with valve seat. When mounting them between two ISO-KF flanges (instead of a centering ring), the open flaps must be orientated against the air flow in the vacuum line. When the roughing system goes into operation, a strong air flow occurs in the roughing line, which immediately closes the valve and reduces the pipe section by about 99%. When reaching a differental pressure of approx. 15 mbar, the valve opens and leaves the pipe sectionnearly unobstructed for further pumping.

Suppliers

Company
Product
Description
Supplier Links
Soft Start Valve - Series 311 - VAT, Inc.
VAT, Inc.
San Jose, CA, USA
Soft Start Valve
Series 311
Soft Start Valve Series 311
Soft-start valves consist of two halves of throttle flaps supported on a common axis and maintained in the open position by a spring. The axis is held in an ISO-KF centering ring that is formed as a body with valve seat. When mounting them between two ISO-KF flanges (instead of a centering ring), the open flaps must be orientated against the air flow in the vacuum line. When the roughing system goes into operation, a strong air flow occurs in the roughing line, which immediately closes the valve and reduces the pipe section by about 99%. When reaching a differental pressure of approx. 15 mbar, the valve opens and leaves the pipe sectionnearly unobstructed for further pumping.

Soft-start valves consist of two halves of throttle flaps supported on a common axis and maintained in the open position by a spring. The axis is held in an ISO-KF centering ring that is formed as a body with valve seat. When mounting them between two ISO-KF flanges (instead of a centering ring), the open flaps must be orientated against the air flow in the vacuum line. When the roughing system goes into operation, a strong air flow occurs in the roughing line, which immediately closes the valve and reduces the pipe section by about 99%. When reaching a differental pressure of approx. 15 mbar, the valve opens and leaves the pipe sectionnearly unobstructed for further pumping.

Supplier's Site

Technical Specifications

  VAT, Inc.
Product Category Vacuum Valves
Product Number Series 311
Product Name Soft Start Valve
Type Throttle Valve
Port OD 0.6250 to 2 inch (15.87 to 50.8 mm)
Temperature Range 302 F (150 C)
Unlock Full Specs
to access all available technical data

Similar Products

Vacuum Breaker - VB075V-TF - Plast-O-Matic Valves, Inc.
Plast-O-Matic Valves, Inc.
Vacuum Breaker
VB075V-TF
Specs
Type Diamphragm
Port OD 0.7500 inch (19.05 mm)
Vacuum / Pressure Range Elevated or positive pressures (>> 760 torr)
View Details
Vacuum security valve - ISV-M4 - Festo Corporation
Festo Corporation
Vacuum security valve
ISV-M4
Specs
Temperature Range 14 to 140 F (-10 to 60 C)
Body Materials Aluminum
View Details
HV Gate Valve - Series 091 - VAT, Inc.
VAT, Inc.
HV Gate Valve
Series 091
Specs
Type Gate
Port OD 2 to 6 inch (50.8 to 152 mm)
Vacuum / Pressure Range (HV, < 10-3, >10-8 torr); Elevated or positive pressures (>> 760 torr)
View Details
Electronic Vacuum Regulators - - Equilibar, LLC.
Equilibar, LLC.
Electronic Vacuum Regulators
Specs
Type Inline; Diamphragm
Port OD 0.2500 to 4 inch (6.35 to 102 mm)
Vacuum / Pressure Range Low or roughing vacuum level (> 1 torr)
View Details