Century Instrument Company
Century Instrument Company
Address: 11865 Mayfield,
Livonia, MI 48150
Phone: 734.427.0340
Fax: 734.427.5950
Email: info@centuryinstrument.com
Website: www.centuryinstrument.com
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Wide Selection — available in a wide variety of body materials, linings and end connections. By utilizing such highly resistant linings as Saran, Polypropylene, Kynar, Tefzel, Glass, Rubber, etc., virtually any chemical service within the pressure/temperature limits of the valve can be handled safely and economically.

No Stem Leakage — since the diaphragm isolates the fluid stream there is no need for a packing gland — no atmospheric contamination, no leakage or waste, no expensive maintenance of stem, seats or stuffing box.

Bubble-Tight Shut Off — results when the downward thrust of the stem and compressor assembly molds the flexible diaphragm against the weir. The diaphragm will accommodate itself to rust, scale, slurry, or fibrous material.

Streamline Flow — with minimum pressure drop because of the absence of grooves, pockets or sharp changes in direction of flow.

Cost Saving — simple in-line maintenance. In less time than it takes to remove and replace a conventional valve, a new body diaphragm can be installed. Thus providing essentially a brand new valve at a tiny faction of the cost of a new or repaired conventional valve — all without removing the valve body from the line.

Flow Control — the automated diaphragm valve provides an excellent means of handling the changing flow requirements in most process installations. By the addition of a positioner to the actuator, even more precise control can be achieved, especially in the handling of slurries, or viscous and fibrous materials.

Body Materials — available in cast iron, ductile iron, carbon steel, stainless steel, Alloy-20, aluminum and bronze
Unit of Measure

Specifications

Body Material

 N/A Cast Iron

Temperature Range

 N/A -30 to 300 ºF

Typical Applications

 N/A Maximum resistance to aggressive chemicals and solvents at elevated temperatures. Excellent anti-stick properties.

Lining Options

 N/A Glass

Material/Lining Classification

 N/A Metal Glass

End Connection

 N/A
(1) Flanged Lined Ends

End to End Dimension A

 N/A 7 5/8 in

Valve Size [Fraction]

 N/A 2 in

Valve Size [Decimal]

 N/A 2.00 in50.80 mm

Diaphragm Control Valve Options

 N/A 730-RV, Pilot Operated Controller Option
Line Pressure Conditions1 N/A 0% P.D 100% P.D.

Services

 N/A Acetaldehyde Acetic Acid (Glacial) Acetic Acid (to 60%) Acrylonitrile Aluminum Chloride Aluminum Nitrate Aluminum Sulfate Amino Acid Ammonium Bromide Ammonium Nitrate Battery Acid Brine (Chlorinated) Brine (Pickling) Bromine, Gas Bromine, solution Calcium Hypoclorite Cane Sugar - Refined Carbon Tetrachloride Carbonated Beverages Carbonic Acid Casein Water Paint Chlorinated Hydrocarb. Chromic Acid Chromium Citric Acid Citrus Concentrate Copper Chloride Copper Plating Corn Oil Corn Syrup Distilled Water Edible Oils Ethylene Dibromide Ethylene Dichloride Ethylene Glycol Fatty Acids Ferric Chloride Ferric Nitrate Formaldehyde - 40% Formic Acid - 85% Hydrobromic Acid Hydrochloric Acid Hydrogen Bromide Hydrogen Chloride Hydrogen Peroxide (30%) Hydrogen Peroxide (90%) Lactic Acid Latex Mercaptans Milk Muriatic Acid Neoprene Latex Nitric Acid - to 20% Nitric Acid - to 70% Paint Persulfuric Acid Phenol Photographic Solutions Picric Acid Plasma Potassium Perchlorate Propylene Glycol Rayon Spin Bath Salt Brine Sea Water Silver Nitrate Sodium Chloride Sodium Nitrate Sodium Perchlorate Soft Drink Syrups Sugar Sulfuric Acid - to 50% Sulfuric Acid 50 to 79% Tomato Juice Trichioro-ethylene Vacuum below 25 mm, Hg. Vacuum to 25 mm. Hg. Varnish Vegetable Juice Vinegar Water - PotaDle Water - Sterile Whiskey/Wine Yeast

Weight

 N/A 24 lb

Diaphragm Selection

Diaphragm Material

 N/A PTFE Faced

Diaphragm Material Description

 N/A TFE PTFE - over the years, a broad range of elastomeric and plastic diaphragms have been developed which will successfully handle all aggressive fluids, gases and slurries, as well as food, beverage and pharmaceutical products where F.D.A. approval of materials of construction is required. The TFE faced diaphragm is backed with fabric reinforced elastomer to provide the high chemical and temperature resistant qualities of TFE with flexibility for longer life and tighter shut-off.

Standard Actuator Features

Actuator Size Number

 N/A 0, Actuator Size "0"
1, Actuator Size "1"
2, Actuator Size "2"
2A, Actuator Size "2A"
3, Actuator Size "3"
4, Actuator Size "4"
5, Actuator Size "5"
Action of Actuator2 N/A
(TYPE C) Air to Open - Air to Close

(TYPE H) Spring to Open - Air to Close

(TYPE HRT) Spring to Close - Air to Open
  • 1 100% P.D. means that downstream pressure falls to 0 psig.

    0% P.D. means that downstream pressure remains at, or returns to essentially the same as the upstream pressure.
  • 2 The choice of actuator size is determined by the line pressure through the value and the available operating air pressure. Some operating conditions call for substantial line pressure downstream when the valve closes.

    After the valve closes, if the downstream pressure is less that 30 % of the upstream pressure - this condition is 100% Δ P. If the downstream pressure is 30% or more of the upstream pressure - the condition is 0% Δ P.