Double Block and Bleed Valves

Double Block and Bleed Valves

At Hy-Lok, we create value for our clients by engineering high quality double block bleed valves customized to match individual process requirements.

Our compact, integrated designs and accurate, rugged construction provide a high reliability solution for complex multiple instrument valve systems. Able to tolerate temperatures from -70.6°F to +1,002°F, and pressures to 10,000 psig, our products reduce overall fluid system weight and height, provide fewer leak paths and eliminate the damaging effects of system vibration.

Our unique design approach achieves the highest level of seal integrity and optimal process compatibility. We create flexible configurations with a wide variety of end connections, body types, and valve technologies for critical piping applications including instrument isolation; pressure, level and flow measurement; instrument drain; chemical injection; and sampling.Constructed primarily from 316 stainless steel, a variety of material options for ball seat, trim, stem, and end connector o-rings are available to accommodate specific process conditions.

We manufacture our valves under the strict controls of our ISO 9001 and ASME certified quality assurance program to ensure process integrity. In addition to sourcing only premium quality materials, our Heat Code Traceability system provides technical documentation verifying that raw materials meet all code requirements. We pressure test each valve to withstand client-specific plant conditions and repeatedly measure products for dimensional accuracy at all critical points in the production cycle.
For more information about our custom valve manufacturing capabilities, please review the table below.

Highlights of Hy-Lok's Double Block & Bleed Valves

Product Name Double Block and Bleed Valve
Function Provide compact installation for gauge or transmitter instruments
Alternative to multivalve systems
Valve Types Modular Valve
Monoflange Valve
Root Valve
Options BAll Seta Material
Trim Material
Stem and End Connector O-Ring
Advantages More compact design
Reduced weight/height
Reduced leakage points
Reduced effect of system vibration
Supporting brackets are not required
Reduced bending moment acting on the vessel
Reduced installation cost
Reduced Gaskets and Bolting
Materials 316 Stainless Steel
Super Duplex
Testing Hardnesss testing
Fire testing
Dimensional Inspection
Hydrostatic testing
Full Pressure testing
Hydrostatic Seat Test
Pneumatic Test
Temperature Min: -70.6 F
Max: 1022 F
Pressure Max: 10,000 psig
Size Varies
Quality Quality Assurance
Production Volume Low Volume
Short Runs

Additional Information

Industry Focus Architectural
Power Generation
Applications Double Block and Bleed Instrument Isolation
Gauge Isolation
Instrument Drain
Chemical Injection Connection
Sample Connections
Chemical Seal Instrument Isolation
Piping/instrument Interface
Direct Mounting of Instruments
Remote mounting of instruments
Industry Standards ANSI - American National Standards Institute
ASME - American Society of Mechanical Engineers
API - American Petroleum Institute
ISO - International Organization for Standardization
File Formats AutoCAD (DWG,DWZ)
DXF - Drawing Interchange Format, or Drawing Exchange Format
IGES - Initial Graphics Exchange Specification, ANSI file format
JPG or JEPG - Joint Photographic Experts Group
PDF - Portable Document Format
Pro-E or Pro/Engineer (DRW,PRT,XPR)
STEP - Standard for the Exchange of Product Model Data

Additional Resources

Fluid Compatibility Guide

Product Catalogues

Certification Library