|    June 2014

Monthly Archives: June 2014


Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a “setpoint” to a “process variable” whose value is provided by sensors that monitor changes in such conditions.[1] Control Valve is also termed as the Final Control Element.

The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals. These control signals, traditionally based on 3-15psi (0.2-1.0bar), more common now are 4-20mA signals for industry, 0-10V for HVAC systems, and the introduction of “Smart” systems, HART, Fieldbus Foundation, and Profibus being the more common protocols. Some of the control valve available are Reverse Double-Ported Globe-Style Valve Body,Three-Way Valve with Balanced Valve Plug, Flanged Angle-style control valve body and . Valve Body with Cage-Style Trim, Balanced Valve Plug, and Soft Seat.

A control valve consists of three main parts in which each part exist in several types and designs:

Valve’s actuator

Valve’s positioner

Valve’s body

Types of control valve bodies

The most common and versatile types of control valves are sliding-stem globe and angle valves. Their popularity derives from rugged construction and the many options available that make them suitable for a variety of process applications, including severe service.[3] Control valve bodies may be categorized as below:


Type P51 Stainless Steel Gas Regulators & Filters (NACE Compliant)

The Type P51SS stainless steel regulator is designed for service with a wide variety of corrosive gases and environments.Special construction features include 316 SS housing and filter assemblies, with fluorocarbon elastomers used for the control diaphragm and the supply valve.

Available modules include differential, gauge, vacuum and absolute pressure as well as temperature, and voltage/current. A voltage and current meter is integral to the base unit. All HART® field devices can be configured, polled, and trimmed using HART® communications. Device Specific commands for supported devices are included with the MFT.

This ruggedly built regulator operates in pressure ranges up to 150 PSIG (10.3 BAR). The P51SSFR and P51SSAR Regulators and the P51SSF and P51SSAF filter assemblies have built-in dripwells which trap water, oil and other contaminant’s. The contaminant’s are easily flushed out of the dripwell via a convenient manual or automatic drain valve. The 40-48 Micron Filter is constructed of sintered 316 stainless steel, and is easily removed.

The P51SS products can be through-panel mounted with the mounting nut supplied (regulators only), bracket-mounted using the optional bracket (regulators only), or pipe mounted by its ports (regulators and filters).

The regulators and filter assemblies comply with NACE Standard MR0175 (Metals for Sulfide Stress Cracking and Stress Corrosion Cracking Resistance in Sour Oilfield Environments.)


Manual or automatic drain options

Low droop

Excellent stability and repeatability

Tapped vent for exhaust gas capture

Built-in filter assemblies and dripwells

Soft relief seat for low gas consumption

Filter only assemblies available

Panel, bracket or pipe mounting

Ideal for sour gas and corrosive applications or environments



Type 50 & Type 50 NACE Precision Filter Air Set Regulators

The Marsh Bellofram Type 50 & Type 50 NACE are reliable, precision filter air set pressure regulators, designed for instrumentation and general purpose use in both standard (Type 50) and corrosive environments (Type 50 NACE). The Type 50 NACE complies with NACE material requirement #MR-01-75 for sulfide stress cracking-resistant metallic materials for oil field equipment.

The rugged design and construction of the Type 50 includes the incorporation of die cast aluminum housings that are finished with epoxy paint for added protection against scratching, weathering and other challenging environments. Careful design and use of quality materials ensure long, trouble-free operation, even in the most difficult of industrial environments. The user-adjustable Type 50 series offers superior pressure regulation vs. flow characteristics, excellent stability, repeatability and built-in filter with dripwell. A rubberized, soft-seat valve stem provides positive shut-off and “forgives” dirt or other foreign matter. An aspirator maintains downstream pressure and compensates for droop when high flow occurs. A gauge port facilitates convenient gauge installation and can be used as an additional full flow outlet. In addition, Type 50 NACE regulators include an easily serviceable and self-cleaning 316 stainless steel mesh filter that can be side, panel, pipe or through-body mounted.


Superior Regulation Characteristics

Rugged, Corrosion-resistant Construction

Excellent Stability and Repeatability


Integral 40 Micron, Self-cleaning Filter

Low Droop at High Flow

Several Mounting Options

Meets ATEX II 2 G Dc T 6 (Non-electrical Certification)

Units are Both Pressure and Leak Tested Before Factory Shipment


Oilfield Equipment (NACE approved version)

Chemical Processing Plants (NACE approved version)

Corrosive Industrial Environments (NACE approved version)

Air Chucks

Air Spray Guns

Air Cylinders and Actuators

Industrial Pneumatic Systems and Equipment

Pilot-operated Controllers and Instruments



Pressure gauge

 Dial Size (mm) 63, 80 ,100, 150, 250
Scale Range 0.. Vacuum to 700 kg/cm2 & above on request
Accuracy in FSD 1%
Thread Connection 3/8″, ½”, BSP & NPT, M-20 and Flanged connection
Mounting of Gauge Bottom, Surface
Case and Bezel SS 304
Pressure Elements Bourdon Tube
Diaphragm YES
Wetted Parts SS316, SS316L, Teflon, Monel, Hastalloy & other on request
Application Chemical and Petrochemical, Plastic and paper, Pharmaceutical, Water treatment.
Optional Electric Contact, Back Mounting & Liquid Filled


Pressure gauge

Rolling Diaphragm CylindersFriction-free conversion of pneumatic pressure to linear force.The advent of the long stroke rolling diaphragm as a means of low-friction dynamic sealing has led to the development of ControlAir’s line of Diaphragm Air Cylinders. These cylinders provide virtually frictionless conversion of pneumatic pressure to linear force. The fact that there is no stiction or blow-by of any kind ensures accuracy, repeatability and sensitivity unheard of from conventional sliding seal air cylinders

Specifications :

Our Cylinders are rated to operate on plant air up to 145 psi (10 Bar) at a temperature range of -40° F to 225° F. Custom diaphragm materials can be used to permit our cylinders to operate at temperatures from -75° F to 400° F. Although ControlAir’s standard line of cylinders are for air service only, modifications are available to accommodate hydraulic or liquid pressurized applications.


Pressure gauge

Type -2000The Marsh Bellofram Type 2000 is a highly robust E/P transducer with typical full-scale accuracy of 0.1%, designed to provide precise electronic pressure control of humid (non-condensing) and oil-laden process gases within harsh industrial environments.

With a unique design that incorporates a patented, hermetically sealed piezoceramic Dimorph and isolated electronics, the Type 2000 pressure transducer regulates an incoming supply pressure down to a precise output that is directly proportional to an electrical control signal, with available pressure ranges to 120 PSIG. In addition, the Type 2000 features a top-mount cover, which provides access to field-configurable inputs and outputs, direct/reverse acting/ranging, which allows the transducer to regulate to maximum output at minimum input; and split/full ranging capabilities. Units also feature IP66 environmental sealing for added durability. The uniquely rugged construction of the Type 2000 facilitates exceptional performance and longevity, making it ideal for use within corrosive environments. This design also eliminates many of the performance issues seen in other industry piezoceramic pressure transducers, such as electronic range of authority, arcing, silver electrode migration, electrode micro cracking, de-poling, and low voltage-to-work density.


Explosion-proof and Dust-ignition Proof Versions (EX Model)

Patented, Hermetically Sealed Piezoceramic Dimorph and Isolated Electronics

Available Pressures to 120 PSIG (Zero Based)

High Immunity to EMI/RFI

Insensitivity to Extreme Temperature and Supply Pressure Fluctuations

Insensitivity to Extreme Vibration and Orientation

NEMA 4X, CE, and FM and ATEX (Intrinsically Safe) Approved Versions (S Model)

±0.1% of full-scale output typical (0.25% guaranteed); includes effects of hysteresis, dead band, and repeatability



MFT 4000 Calibrator is a base unit for calibration work with selected NIST traceable sensor modules & integral voltage/current meter. The MFT 4010 Calibrator with HART® is a base unit for modules and full device specific HART® communications. Quick Cal displays HART® PV and AO along with MFT’s NIST traceable measurements. User can identify needed trim(s) and access the trim function(s) from same display. Smart Trim allows selection of analog or digital trims without navigating through menu trees. Documenting included. Documenting memory stores up to 200 HART® configuration files and over 100 calibration results (as-found & as-left data [up to 21 points each], time/date info, tag). Communicate with PC via DB-9 connector.

Available modules include differential, gauge, vacuum and absolute pressure as well as temperature, and voltage/current. A voltage and current meter is integral to the base unit. All HART® field devices can be configured, polled, and trimmed using HART® communications. Device Specific commands for supported devices are included with the MFT.




The MFC5150 HART Communicator is the latest addition to Merriam’s product line of calibrators and communicators. Available in ATEX (intrinsically safe) and Non-ATEX models, the MFC5150 directly reads Device Descriptions without any translations or subscriptions, enabling communication to take place with any registered or unregistered HART device…ensuring your HART transmitter will connect, regardless of brand or model. The MFC5150 is built on the SDC-625 infrastructure and runs Windows CE. With a 1GHz processor and an 4GBMicro SD card, the communicator is ideal for all of your data storage needs. The 4.3 inch touch screen provides excellent anti-glare viewing, allowing for comfortable use in darkness or in bright sunlight. All functions are easily navigated via the full QWERTY keyboard and intuitive icons similar to that of a smart phone. There are also hyperlink menu paths, teachable device specific shortcuts, instant on, multiple languages, help context, video’s and TAB access to panes just like on a computer.

New Features Include

Full suspend/resume functionality

Improved user GUI interaction (data entry, screen response, gesturing, HART beat

Repolling for HART devices

Hot Key Menu

Typical Applications

Commission devices

Reconfiguration for process changes

Troubleshoot devices with HART

Ease of Use

Quick start up and connect

On demand help menus

Manage device information through PC connection

Standard Features Include

No subscriptions required

Charging cradle with USB connection

ATEX (Intrinsically Safe) and Non-ATEX models available

Reads manufacturers’ DDs in their native format from any HART registered or unregistered device, eliminating the need for translations

Rechargeable Battery with 10 hrs continuous, 20 hrs standard use and 200 hrs standby/hibernate