headerdrawing1.jpg (96365 bytes)

Sulphuric Acid on the WebTM Technical Manual DKL Engineering, Inc.

Knowledge for the Sulphuric Acid Industry Line.jpg (1139 bytes)

Sulphuric Acid on the Web

Introduction
General
Equipment Suppliers
Contractor

Instrumentation
Industry News
Maintenance
Acid Traders
Organizations
Fabricators
Conferences

Used Plants
Intellectual Propoerty
Acid Plant Database
Market Information
Library

Technical Manual

Introduction
General

Definitions
Instrumentation
Plant Safety
Metallurgial Processes
Metallurgical
Sulphur Burning
Acid Regeneration
Lead Chamber
Technology
Gas Cleaning
Contact
Strong Acid
Acid Storage
Loading/Unloading

Transportation
Sulphur Systems
Liquid SO2
Boiler Feed Water
Steam Systems

Cooling Water
Effluent Treatment
Utilities
Construction
Maintenance
Inspection
Analytical Procedures
Materials of Construction
Corrosion
Properties
Vendor Data

DKL Engineering, Inc.

Handbook of Sulphuric Acid Manufacturing
Order Form
Preface
Contents
Feedback

Sulphuric Acid Decolourization
Order Form
Preface
Table of Contents

Process Engineering Data Sheets - PEDS
Order Form
Table of Contents

Introduction

Bibliography of Sulphuric Acid Technology
Order Form

Preface
Contents

Sulphuric Acid Plant Specifications
 

Google Search new2.gif (111 bytes)

 

log 2.JPG (76785 bytes)

Sharplex.jpg (28953 bytes)

MAHLEInd.jpg (21078 bytes)

 


Strong Acid System - Valves
April 23, 2004

Introduction
Plug Valves
Butterfly Valves
Gate Valves
Globe Valves
New Products
Associated Links

Gaskets - Strong Acid


Introduction

A variety of valve types and materials are used throughout the strong acid system.  The corrosive nature of sulphuric acid requires that special attention be paid to materials of construction to ensure long service life and reliable operation.

Plug Valves

Plug valves are used for isolation purposes and on/off service only.  They are available in sizes from ½” through to 18”.   Sizes larger than 8” diameter are not normally used partly due to cost and the increased flange-to-flange dimensions.  For isolation purposes, gate valves are more suitable in the larger sizes.

Manufacturer XOMOX XOMOX DURCO DURCO
Model Tufline 067 Tufline 061 G4 T-41
Type Sleeved Fully Lined Sleeved Fully Lined
Size Range ½” to 18” ½” to 8” ½” to 18” ½” to 8”
Body Material

Ductile Iron
316 SS / A351 CF8M

Alloy 20 / A351 CN7M

CD4MCu

Carbon Steel or Ductile Iron

Ductile Iron

316 SS / A351 CF8M

Durimet  20 / A351 CN7M

CD4MCu/Durcomet 100

Durcomet 5 (High Si SS)

Ductile Iron
Plug Material

Ductile Iron

316 SS / A351 CF8M

Alloy 20 / A351 CN7M

CD4MCu

Stainless Steel or Ductile Iron

Ductile Iron

316 SS / A351 CF8M

Durimet  20 / A351 CN7M

CD4MCu/Durcomet 100

Durcomet 5 (High Si SS)

Ductile Iron
Sleeve PTFE N/A PTFE N/A
Lining N/A PFA or FEP N/A PTFE
Connection 150 lb Flanged 150 lb Flanged 150 lb Flanged 150 lb Flanged
Wrench/Lever Operator ½” to 4” ½” to 4” ½” to 4” ½” to 4”
Gear Operator 4” to 18” 4” to 8” 4” to 18” 1" to 8"
  xomox067.JPG (7096 bytes) xomox061.JPG (5400 bytes) durcog4.JPG (5563 bytes) durcot41.JPG (6591 bytes)

The selection of materials for the body, plug and other wetted parts will depend on the service conditions.

Butterfly Valves

Butterfly valves are used primarily for flow control and regulation.  The seat design will determine if the valve will provide positive shutoff.  A swing-thru seat design should not be used for isolation as it will not provide positive shutoff.

Manufacturer DURCO LEWIS XOMOX  
Model BTV 2000 - Tufline  
Type Fully Lined Metallic, Swing-Thru Metallic  
Size Range 2" to 24" 4" to 24" 3" to 48"  
Body Material Ductile Iron (2" to 12")
Cast Steel (14" to 24")
Lewmet Alloy 20 (1)  
Disc Material DIPA-PFA encapsulated nickel plated ductile iron Lewmet Alloy 20 (1)  
Lining PTFE N/A N/A  
Connection Lug or Wafer Wafer Lug or Wafer  
Wrench/Lever Operator 2" to 8" Consult Vendor Consult Vendor  
Gear Operator 2" to 24" Consult Vendor Consult Vendor  
  btv2000.JPG (9794 bytes) lewisbfly.JPG (5755 bytes) xomoxbfly.JPG (7606 bytes)  

(1) Other materials available, consult vendor.

The selection of materials for the body, disc and other wetted parts will depend on the service conditions.

Gate Valves

Gate valves are used isolation purposes.  They are not designed for throttling service.

Manufacturer LEWIS      
Model        
Type Double Disc      
Size Range 2" to 24"      
Body Material Process Iron (A278 class 35)
Lewmet
     
Disc Material Lewmet      
Stem Alloy 20      
Seat Lewmet      
Handwheel Non-rising      
Stem Rising      
  lewisgate.JPG (9477 bytes)      

The selection of materials for the body, disc and other wetted parts will depend on the service conditions.

Globe Valves

Globe valves are used flow control. 

Manufacturer LEWIS      
Model        
Port Type Parabolic      
Size Range 1/2" to 6"      
Body Material Lewmet
Alloy 20
     
Plug Material Lewmet      
Stem Lewmet
Alloy 20
     
Seat Lewmet      
  lewisglobe.JPG (10255 bytes)      

The selection of materials for the body, plug and other wetted parts will depend on the service conditions.

New Products

valveassortment.jpg (9433 bytes)AVT (Advanced Valve Technologies) is pleased to announce the launch of its new Sulphuric Acid Valve, able to handle an unusually wide range of sulphuric acid duties. The new ANSI150 and PN16 valves, based on a proprietary Novolac material technology, will accept duties in concentrations from 1% to 99%, working at temperatures up to 190°F (90°C). This ability to handle a wide range of concentrations in Sulphuric service is an exciting development for an industry where extremely expensive exotic alloys struggle to cover a wide range of concentrations whilst PTFE lined valves suffer problems due to liner failure and exterior attack. Furthermore, the new AVT valves typically offer a 30% to 80% cost saving over these alternative valves, and a 6 week manufacturing lead-time for project volumes - compared to 15 weeks for some alloy materials. The new Sulphuric Acid Valve joins the growing range of AVT products, already recognised for "class busting" performance in Hydrochloric Acid and other corrosive media. Advanced Valve Technologies (AVT) is the world leader in applying reinforced composite technologies to valves and related products. Their range of 20 bar (300psi) rated full port ball and double offset performance butterfly valves offer outstanding corrosion resistance, 60% weight savings over metallic valves, outstanding pressure-temperature characteristics and a compelling cost of ownership for applications in the Chemical, Offshore and Marine markets.

www.advalve.com