A double block and bleed valve offering unique solutions to High Integrity Pressure Protection Systems (HIPPS)

The TESCOM  Anderson Greenwood Instrumentation (AGI) Keyblok – Interlock Manifold is a double block and bleed valve offering unique solutions to High Integrity Pressure Protection Systems (HIPPS) and Safe Plant Shut-Down Systems applications for isolation and calibration of instrumented equipment.

General Application

The TESCOM AGI Keyblok is suitable for use in instrumented pressure protection systems requiring SIL3 capabilities and where full flow relief proves impractical. Process to instrument isolation with controlled operation of isolation and vent functions for operator and system safety.

Features

• Compact and ergonomic single-piece body design reduces installation cost due to reduced weight and smaller envelope space than alternative designs.
• Unique single key interlock system provides enhanced safety with reduced chance of error. • Easy to identify actuation position increases safety in process operations by visual confirmation of valve position.
• Application flexibility increases cost savings by utilizing only specification required valve(s) compared to alternative designs.
• Flexibility of design through a single design style provides a cost-effective solution for single or multiple pressure tap points.
• Sequenced valve operation.
• PEEK seats (ANSI Classes 150 and 2500).
• Proximity switch (SIL3, ExII 1G Exia IIC T6) plus bracket.
• Compliant with Pressure Equipment Directive.
• Body material certified to EN10204 3.1.

Overview

The Keyblok interlock manifold’s simple, single step key operation and quarter-turn positive visible indication provides a safer manifold for HIPPS applications.

It represents the ultimate solution in a range of compact, single-piece, forged-body assemblies, featuring a choice of end connections and mounting styles.

Interlock DBB valve assemblies are designed to comply with the following code requirements:

• ASME B16.34 Material wall thickness
• ASME VIII, DIV 1 Design procedures and materials
• ASME B1.20.1 National Pipe Threads
• Compliant to IEC 61508.2010 and IEC 61511:2003

SIL compliance

The Keyblok interlock manifold is suitable for use in SIL3 and above applications. Manifold arrangements: HFT0 = SIL3; HFT1 = SIL4; HFT2 = SIL4.

Ball valve technical specifications

The Keyblok interlock DBB valve features our high-performance ball valve design for reliable performance and bubble-tight isolation. The isolation and vent functions are achieved with our 10 mm (3/8″) bore ball valve which has a floating pattern, through bore – fully roddable, anti-static design.

• Precision machined solid ball and seats to provide effective isolation and repeatability, with a low operating force
• Anti-blow out stem design
• Valve design provides cavity relief and uni-directional flow
• Fire-safe design and tested to API 607
• Pressure rating up to 10,000 psig (680 barg)
• Temperature range -70°F to +400°F (- 57°C to +204°C)
• Soft seat – PEEK
• One piece stem design
• Graphite fire-safe seal
• 316 SS lever handle
• T-ball vent valve
• Cam handle anti-tamper system

Quarter-turn ball valve for isolation and T-ball vent

Installation Variants

DBB valve – The Keyblok interlock manifold is available in two designs to provide the ideal solution in accommodating different installation practices.

Product Configurations[1] Single transmitter assembly – for individual tapping connections

H64F style – Individual pressure tapping arrangement HFT0 = SIL3

Arrangement of three transmitters on individual tappings HFT2 = SIL4

NOTE: It is important that any device (instrument) connected to the outlet of the manifold must be SIL3 or greater to maintain SIL compliance.

Multiple Transmitter Assemblies – for instrument redundancy applications
H64T_TP*2 style – 1oo2 (one out of two) arrangement HFT1 = SIL4

H64T_TP*3 style – 2oo3 (two out of three) arrangement HFT2 = SIL4

Option: Instrument enclosure for protection of assembly

H64T_TP** Enclosure style

Where environmental conditions require the manifold DBB assembly to be

protected, we can provide design and supply to fit the manifold system into our

instrument enclosure range to satisfy the installation specification.

NOTE: It is important that any device (instrument) connected to the outlet of the manifold must be SIL2 or greater to maintain SIL compliance.

Shipments Delayed or Stuck at Port?

Get your TESCOM AGI instrument valves, manifolds and gauge valves delivered to you much faster than overseas sources.

Frustrated that your overseas 🚢 shipments are delayed or stuck at port?

In addition to Westech’s healthy inventory of over 20,000 TESCOM AGI instrument valve’s, manifolds and gauge valves, AGI can have a factory order delivered to you much faster than overseas sources thanks to their products being machined and manufactured in North America; saving significant time and risk by not needing to ship through congested and unreliable infrastructure. So when you need it we have it!

Check out our range of TESCOM AGI instrumentation products by visiting our website at https://bit.ly/3AWkJfb or call us today at 1-800-912-9262 to find out about our bulk discounts.

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