Help with Diaphragm Seals facets:
Diaphragm Seal Design
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| Seal Design: | |||
| Your choices are... | |||
| Welded Diaphragm | The diaphragm is welded (or bonded) directly to the upper housing, permitting removal of the upper housing without a loss of fill fluid. | ||
| Clamped Diaphragm | A nonwelded type of diaphragm in which the diaphragm is clamped between the upper and lower housing. The diaphragm can be removed and replaced. | ||
| Capsule Diaphragm | The upper housing can be removed without loss of the fill fluid because the fill fluid is contained inside a capsule. | ||
| Other | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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Instrument Connection Specification
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| Instrument Connection Type: | A connection in the upper housing to which the pressure instrument is remotely or directly attached. | ||
| Your choices are... | |||
| 1/8" NPT | |||
| 1/4" NPT | |||
| 1/2" NPT | |||
| Other | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Thread Gender: | |||
| Your choices are... | |||
| Female | Female NPT threads. | ||
| Male | Male NPT threads. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Integral Bleed Connection? | A connection used for bleeding excess fill fluid. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Process Connection Specifications
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| Process Connection Type: | The process connection is the connection from the lower housing to the process system. | ||
| Your choices are... | |||
| Flanged | The lower housing's integral flange is connected to the process line, tank or vessel companion flange. | ||
| Threaded | A threaded process connection. | ||
| Welded Pipe | A welded process connection. | ||
| Sanitary | A sanitary process connection, for example Tri-Clover® (Tri-Clamp®) sanitary fittings. | ||
| Other | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Process Connection Size: | The process connection is the connection from the lower housing to the process system. Choose from these common sizes, or choose "Other Connection Type" if you do not see what you need listed here. The sizes listed refer to the thread size or the pipe inside diameter. | ||
| Your choices are... | |||
| 1/8" | |||
| 1/4" | |||
| 3/8" | |||
| 1/2" | |||
| 3/4" | |||
| 1" | |||
| 1-1/4" | |||
| 1-1/2" | |||
| 2" | |||
| 3" | |||
| 4" | |||
| Other | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Thread Gender: | |||
| Your choices are... | |||
| Female | Female NPT threads. | ||
| Male | Male NPT threads. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Integral Flush Port? | A flush port for flushing out the lower housing. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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Process System Parameters
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| Process Temperature at the Seal: | The temperature of the process medium. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Maximum Working (Static) Pressure: | The maximum working pressure of the process system. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Exposed to Vacuum Pressure? | The diaphragm seal is exposed to vacuum pressure in the process system. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Maximum Vacuum: | The maximum vacuum pressure, if the seal is exposed to vacuum pressure. | ||
| Search Logic: | All matching products will have a value greater than or equal to the specified value. | ||
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| Operating Temperature: | This is the full required range of ambient operating temperature. | ||
| Search Logic: | User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria. | ||
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Diaphragm Material & Fill Fluid
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| Diaphragm Material: | The material of which the diaphragm is made. Since the diaphragm and lower housing will be exposed to the pressure medium, the materials selected for these components must be compatible with the pressure medium. Consult the manufacturer for more information. | ||
| Your choices are... | |||
| Hastelloy® | The attributes of Hastelloy® alloys include high resistance to uniform attack and localized corrosion resistance. It also provides stress corrosion cracking resistance, and ease of welding and fabrication. | ||
| Kalrez® | High temperature and chemical resistance. Low compression set. Retains its elasticity and recovery properties better than other high temperature elastomers. Suggested operating temperature (-40° to 600° F). | ||
| Monel® | Monel® alloy has high strength and resistance to a range of corrosive media including seawater, hydrofluoric and sulfuric acids, and alkalis. | ||
| Nickel | An alloying element used as a raw material for certain classes of stainless steel. Nickel provides high degrees of ductility (ability to change shape without fracture) as well as resistance to corrosion. Approximately 65% of all nickel is used in the making of stainless steel. | ||
| Steel - Stainless | Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings. | ||
| Teflon® | Teflon® refers to a class of fluoropolymer resins used for a wide variety of commercial applications. They are highly-resistant to temperature, chemical reaction, corrosion, and stress-cracking . | ||
| Viton® | A range of fluoropolymer elastomers whose formulation can be tailored to a reasonable extent to meet the needs of individual end-uses. They are normally black and have high heat, oil and chemical resistance but indifferent low temperature performance. With the exception of Kalrez® perfluorinated elastomer, they are about the most highly temperature resistant of all commercially available elastomers. | ||
| Other | Other special or proprietary material. | ||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Fill Fluid: | This is the liquid used to fill the upper housing, between the diaphragm and the pressure element. Glycerin or silicone can combine with strong oxidizing agents such as oxygen, chlorine, hydrogen peroxide and nitric acid causing violent reactions. Fill fluids must be chemically compatible with the process fluid, to avoid potentially hazardous reactions in the event of diaphragm rupture. | ||
| Your choices are... | |||
| Glycerin | Glycerin is used in the food and beverage industry. | ||
| Halocarbon® | Halocarbon is used for Oxygen and Chlorine service. | ||
| Fluorolube® | Fluorolube is used for Oxygen and Chlorine service. | ||
| Food Grade Silicone | Food Grade Silicone is used in the food and beverage industry. | ||
| Silicone | Silicone is used in standard applications. | ||
| Vegetable Oil | Vegetable Oil is used in the food and beverage industry. | ||
| Other | |||
| Search Logic: | All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches. | ||
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| Diaphragm Size (Diameter): | Larger diaphragms are capable of larger volumetric displacement. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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| Diaphragm Displacement: | The diaphragm is displaced an amount equal to the volume accommodated by the sensing element of the pressure instrument. | ||
| Search Logic: | User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria. | ||
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Additional Features
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| Cleanout Ring? | The portion of the diaphragm seal attached to the upper housing that clamps the diaphragm seal in place. The upper housing can be removed for welding inspection or diaphragm inspection without loss of the fill fluid. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Capillary Tube for Remote Mounting? | A capillary tube is provided for remote mounting. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Mini-seal? | The compact size permits installation in space-restricted areas. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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| Sanitary Application? | The device is constructed of an easily sterilized material and is designed specifically for hygienic purposes such as medical, pharmaceutical, or food processing applications. It may be certified by a national or international organization (USDA, FDA, etc.) but this is not required. | ||
| Search Logic: | "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice. | ||
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