TESCOM Anderson Greenwood – M6A Series Five Valve Instrument Manifold

Product Overview

The TESCOM Anderson Greenwood M6A Series Five Valve Instrument Manifold is a high-performance manifold specifically engineered for differential pressure transmitter applications in natural gas service. Designed to provide reliable isolation, equalization, venting, and calibration capabilities, the M6A Series combines robust construction, superior sealing performance, and long operational life in demanding high-pressure environments.

The manifold is ideally suited for installation on vertical meter tubing connected to orifice flange unions, typically requiring no additional structural support. Standard static pressure and calibration test connections simplify commissioning, maintenance, and system verification procedures.

Technical Specifications

Pressure Rating

• Maximum Working Pressure:

  • 6,000 psig (414 barg)

Temperature Range

• Operating Temperature:

  • -70°F to +1000°F

  • (-57°C to +538°C)

Orifice Size

• 3/16” (4.8 mm)

Available Materials

• Carbon Steel (CS)

• 316 Stainless Steel (316 SS)

• Monel®

• Hastelloy®

Seat Options

• Soft Seat

• Metal Seat

Connection Types

Instrument Connections

• 1/2” NPT Female

• 1/2” Socket Weld

Process Connections

• 1/2” NPT Female

• 1/2” Socket Weld

Design Features

General Features

• Compact manifold design optimized for differential pressure natural gas applications.

• Easy installation on meter tubing with minimal or no additional support required.

• Integrated upstream or downstream 1/4” FNPT ports for static pressure connection to the meter system.

• Designed for reliable isolation, equalization, venting, and calibration functions.

• Bonnet locking pin fitted as standard to prevent accidental bonnet removal during operation.

• Protective dust caps installed to retain stem lubricant and prevent contamination ingress.

• Rolled and lubricated stem threads minimize galling and reduce operating torque.

• ENC plated stem threads enhance mechanical strength and extend service life.

• Stem backout prevention design improves operator safety under pressurized conditions.

Corrosion and Sealing Performance

• Bonnet-to-body joints and stem threads are isolated from process media to improve resistance against corrosion, particularly in sour gas environments.

• Integral hard back-seat design provides secondary stem sealing when the valve is fully open.

• Available with either soft-seated or metal-seated bonnet assemblies depending on service requirements.

Soft-Seated Bonnet Assemblies

The soft-seated bonnet design incorporates:

• One-piece rotating stem and plug assembly

• Bubble-tight shut-off performance

• FKM O-ring stem packing with PTFE back-up ring

• Reliable sealing performance and extended packing life

• Ideal for abrasive and general gas service applications

Metal-Seated Bonnet Assemblies

The metal-seated bonnet configuration features:

• Rotating stem with free-swivel ball-type seat

• Specially hardened ball seat designed for natural gas service

• Long service life under high-pressure applications

• Patented adjustable PTFE packing gland allowing in-service adjustment

Functional Valve Arrangement

The M6A Five Valve Manifold integrates:

• Two block/isolation valves

• Two equalizing valves

• One vent valve

• Static pressure test ports

This configuration allows safe transmitter isolation, pressure equalization, calibration, and venting during operation and maintenance activities.

Typical Applications

• Differential pressure transmitters

• Natural gas metering systems

• Orifice flange installations

• Flow measurement instrumentation

• Sour gas service

• High-pressure process instrumentation systems

Quality and Reliability

• Engineered for long-term operation in severe service conditions

• High-integrity sealing performance for critical gas applications

• Suitable for demanding oil & gas, petrochemical, and energy industry environments