Emerson Fisher VBL Instruction Manual

Instruction Manual

D103317X012

Fisherr VBL Volume Booster

VBL Volume Booster

February 2014

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 1.................................

Specifications 2...............................

Educational Services 2.........................

Installation 4..................................

Mounting 4..................................

Pressure Connections 5........................

Supply Pressure 5.............................

Exhaust Ports 5...............................

Operating Information 6.........................

Principle of Operation 7.........................

Maintenance 8.................................

Introduction

Figure 1. Fisher VBL Volume Booster

X0648

Scope of Manual

This instruction manual provides installation, operation, maintenance, and parts information for the Fisher VBL
volume booster (figure 1). Refer to separate instruction manuals for information regarding the valve body, actuator,
and other accessories.

Do not install, operate, or maintain a VBL volume booster without being fully trained and qualified in valve, actuator
and accessory installation, operation and maintenance. To avoid personal injury or property damage it is important to
carefully read, understand, and follow all of the contents of this manual, including all safety cautions and warnings. If
you have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

Description

The VBL volume booster is used in conjunction with a positioner on a throttling control valve to increase stroking
speed. The booster has a fixed deadband (controlled by the seat‐to‐seat dimension of the supply and exhaust plugs)
which is factory set during assembly and testing. In addition, the booster incorporates soft‐seat construction and an
integral bypass restriction to eliminate positioner saturation problems that can occur with volume boosters that do
not have these features. Adjustment of the integral bypass restriction is necessary for system stability. This adjustment
does not affect the deadband of the booster, but does permit the control valve to respond to small input signal
changes from the positioner without sacrificing steady‐state accuracy.

www.Fisher.com

VBL Volume Booster

February 2014

It also allows the booster to deliver high‐volume output for fast stroking when large, rapid input signal changes occur.

The volume booster is used to improve stroking speed. If precision valve control is required, the use of a positioner is
recommended. If you use the volume booster only with an actuator, for on‐off control, the integral bypass restriction
on the volume booster must be closed (turned fully clockwise).

To facilitate diagnostic testing, you can install connectors and piping with the VBL volume booster.

The O‐rings and diaphragms in the VBL volume booster are HNBR (Hydrogenated Nitrile). HNBR demonstrates
excellent temperature capability and shelf life over standard nitrile.

Instruction Manual

D103317X012

Specifications

Specifications for the VBL volume booster are listed in table 1. Information for an individual unit as it comes from the
factory appears on the nameplate.

Educational Services

For information on available courses for the VBL volume booster, as well as a variety of other products, contact:

Emerson Process Management
Educational Services, Registration
P.O. Box 190
Marshalltown, IA 50158-2823
Phone: [phone] or 641-754-3771
FAX: [phone]
e-mail: [e-mail]

2

Instruction Manual

D103317X012

Table 1. Specifications

VBL Volume Booster

February 2014

Input Signal

Positioner output

Maximum Input Signal Pressure

(1)

VBL-1 and VBL-3: 5.5 bar (80 psig)
VBL-2 and VBL-4: 10.3 bar (150 psig)

Input to Output Pressure Ratio

Fixed at 1 to 1

Supply Pressure Ranges

(1)

When used in conjunction with a positioner or other
pneumatic accessory, always pipe the positioner and
booster with one common supply through a Fisher
67D, 67DR, or 95H regulator (see figure 4). A
high‐capacity filter, such as the Fisher 262K, should
be installed in the supply line to the regulator. Supply
pressure also must not exceed the maximum
pressure rating of the actuator.

Operative Temperature Limits

(1)

-40 to 93_C (-40 to 200_F)

Maximum Flow Coefficients

See table 2

Connections

Input Signal: 1/4 NPT
Supply and Output Signal: 1/2 NPT

Hazardous Area Classification

Complies with the requirements of ATEX Group II
Category 2 Gas and Dust

Approximate Weight

Aluminum Body: 1.0 kg (2.2 pounds)

Declaration of SEP

Fisher Controls International LLC declares this
product to be in compliance with Article 3 paragraph
3 of the Pressure Equipment Directive (PED) 97 / 23 /
EC. It was designed and manufactured in accordance
with Sound Engineering Practice (SEP) and cannot
bear the CE marking related to PED compliance.

However, the product may bear the CE marking to
indicate compliance with other applicable European
Community Directives.

NOTE: Specialized instrument terms are defined in ANSI/ISA Standard 51.1 - Process Instrument Terminology.

1. The pressure/temperature limits in this document, and any applicable code or standard limitation should not be exceeded.

Table 2. Maximum Flow Coefficients

Instrument

VBL‐1 volume booster 2.5 1.1

VBL-2 volume booster 2.5 1.1

VBL‐3 volume booster 2.5 1.8

VBL-4 volume booster 2.5 1.8

FIELDVUEt DVC6200, DVC6200 SIS, DVC6200f, DVC6200p,
DVC6000, DVC6000 SIS, DVC6000f digital valve controllers

FIELDVUE DVC2000 digital valve controller
Low pressure relay
High pressure relay

Fisher 3570 valve positioner 0.25 0.25

Fisher 3582 valve positioner 0.17 0.19

Fisher 3610J, 3610JP, 3611JP, 3620J, 3620JP, 3621JP valve positioners 0.37 0.30

Supply Port Coefficients Exhaust Port Coefficients

C

v

0.37 0.31

0.13

0.19

C

0.15

0.20

v

3