EMERSON VCIMD-16352 Spence Type VB Vacuum Breaker Instruction Manual
- June 4, 2024
- Emerson
Table of Contents
EMERSON VCIMD-16352 Spence Type VB Vacuum Breaker
WARNING
Failure to follow these instructions or to properly install and maintain
this equipment could result in an explosion, fire, and/or chemical
contamination causing property damage and personal injury or death.
The Type VB vacuum breaker must be installed, operated, and maintained in accordance with federal, state, and local codes, rules and regulations, and Emerson instructions. If a leak develops in the system, service to the unit may be required. Failure to correct trouble could result in a hazardous condition. Installation, operation, and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation. Either condition may result in equipment damage or personal injury. Only a qualified person shall install or service the Type VB Vacuum Breaker.
Introduction
Scope of the Manual
This manual provides instructions for the operation and installation for the
Type VB Vacuum Breaker.
Product Description
The Type VB Vacuum Breaker is a simple device, which provides a dependable means of relieving an unwanted vacuum condition. The rugged brass body construction provides for long life. With three different NPT sizes available, installation is simple.
Specifications
The specifications section on this page provides the ratings and other specifications for the Type VB Vacuum Breaker.
- Body Sizes
- NPS 1/8, 1/2, and 3/4 / DN 6, 15 and 20
- End Connection Style
- NPT
- Maximum Inlet Pressure(1)
- 125 psig / 8.6 barg
- Maximum Inlet Temperature(1)
- 350°F / 177°C
- Break Point Pressure(1)
- Horizontal: 0.36 psi / 0.02 bar
- Vertical: 0.36 psi / 0.02 bar
Applications
- Condensate Lines
- Heating Coils
- Heat Exchangers
- Jacketed Kettles
- Make-Up Air Coils
- One Pipe Steam Non-Electric Valves
- Steam Boilers
- Storage Heaters
- Steam Mains
- Textile Dry Cans
- Unit Heaters
The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Principle of Operation
If the vacuum increases (decreases in absolute pressure) beyond the setpoint, the vacuum breaker opens. A soft resilient Ethylene Propylene Diene Monomer (EPDM) seat provides quiet opening and closing. This combined with the internal spring prevents ‘chatter’ when the valve is operating.
Installation
WARNING
Personal injury, property damage, equipment damage or leakage due to
escaping steam or bursting of pressure-containing parts may result if this
vacuum breaker is over-pressured or is installed where service conditions
could exceed the limits given in the specifications or where conditions exceed
any ratings of the adjacent piping or piping connections.
To avoid such injury or damage, provide pressure-relieving or pressure- limiting devices (as required by the appropriate code, regulation, or standard) to prevent service conditions from exceeding those limits.
Always install the Type VB in a vertical position with the system connection on the bottom.
Maintenance
The Type VB Vacuum Breaker is maintenance-free. It is designed to have a
rugged brass body construction for long life. No bolts, gaskets or adjustments
are necessary.
Contact Information
Emerson Automation Solutions
Americas
- McKinney, Texas 75070 USA
- T +1 800 558 5853
- +1 972 548 3574
Walden, NY
- T +1 845 778 5566
Europe
- Bologna 40013, Italy
- T +39 051 419 0611
Asia Pacific
- Singapore 128461, Singapore
- T +65 6777 8211
The Middle East and Africa
- Dubai, United Arab Emirates
- T +971 4 811 8100
VCIMD-16352 © 2021 Emerson Electric Co. All rights reserved. 04/21. Spence and Nicholson are marks owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are property of their prospective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
Emerson Electric Co. does not assume responsibility for the selection, use, or maintenance of any product. Responsibility for proper selection, use, and maintenance of any Emerson Electric Co. product remains solely with the purchaser.