MacDonald Specialties - Products

By: Macdonald Specialties  09-12-2011
Keywords: Valves, Alloys


Advanced Valve, Coating and Sealing Technology for Today

Our Products

MDC Specify BOROFUSETM - Process for Outstanding Wear Resistance The Borofuse ProcessTM is a commercially available method whereby boron is diffused into the surface of a wide variety of metals in order to substantially improve surface properties. Boron reacts with the base material to form a fully dense reaction zone of metal borides, increasing surface hardness to very high levels. This effectively becomes a "case-hardening" process producing an exceptionally wear resistant case on a broad range of metal alloys. In addition, surface chemistry is altered, often resulting in improved corrosion resistance relative to the base alloy.Most Metals react with boron to form boride intermetallic compounds. Thus, the Borofuse Process is applicable to many commercially significant materials, including ferrous alloys, nickel and cobalt alloys, metal bonded carbides, and most refractory alloys.

CROSBY - Pressure Relief Valves provide overpressure protection for medium flow applications in Refineries, Chemical, Petrochemical plants, and Power plant auxiliary systems. They are designed to provide overpressure protection on air, gas, vapor, liquid, thermal relief and steam service. Blowdown can be made available in either adjustable or fixed. These valves are manufactured in accordance with the requirements of ASME Boiler and Pressure Vessel Code Section VIII and Section III and complete with CRN (Canadian Registration Number). Precision lapped flat metal-to-metal seats, or elastomer/TFE O-ring soft seats provide the ultimate in seat tightness. Maximum corrosion resistance trim components are stainless steel as standard. All 316SS, Monel, Hastelloy and NACE optional construction are available. 17-4PH SS spring standardization suitable for inlet temperature to 750°F (399°C). Positive built in lift stop. Fewer parts result in increased reliability and ease of maintenance.
Temperature Range:  -450°F to +750°F (-286°C to +399°C)
Pressure Limits: 5000 psig (344 barg)
Steam: 1000 psig (68.9 barg)
Sizes: 1/2" X 1" to 3/4" X 1", 2" X 2" and 1-1/2" X 2-1/2"
End connections: Threaded and Flanged

ELMRIDGE - Jet-Apparatus The three main components of Jet-Apparatus (Converging Nozzle, Suction Chamber, Diffuser), are rigidly fixed in specific relation to each other, hence there are no moving parts - one of the main advantages to this type of device. Gas/Steam Jet Ejectors are a reliable and inexpensive means of developing vacuum in the range of 20 to 27 in/Hg (3 to10 in-Hg abs). Our customer base includes all types of industry; from Water and Wastewater Treatment to Mining, Chemical, and Petrochemical production. Operating characteristics (steam motive - Air Suction), for standard models are stocked, and special units are also available to meet your specifications. Standard materials of construction are Bronze/Brass, Cast Iron-Steel, 316L Stainless Steel, and Alloy 20. Other materials are available upon request. Flange connections are standard, however other connection styles are available.

Keywords: Alloys, Valves