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Diaphragm Seals - NOSHOK
Extend the life and accuracy of your pressure measurement instruments with our high-quality diaphragm seals. Designed to protect gauges, transmitters, and switches from corrosive, viscous, or high-temperature process media, diaphragm seals provide a safe barrier without sacrificing measurement precision. Our selection includes threaded, flanged, inline, and sanitary diaphragm seals, available in a variety of materials, pressure ratings, and connection types to fit your specific application. Commonly used in chemical processing, oil and gas, water treatment, food and beverage, and pharmaceutical industries, these seals help maintain system integrity and reduce costly downtime. Built for durability and compliance, our trusted-brand diaphragm seals deliver leak-free performance, easy maintenance, and long-lasting reliability, making them an essential choice for demanding environments.
Filters 26 Results
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Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Designed to isolate the pressure measuring instrument from corrosive or viscous process mediaUtilize an all welded, all metallic housing design to eliminate potential leak pathsFor use with gauges with dial sizes of 2-1/2" and smaller, and pressure ranges no less than 100 psigHousing and diaphragm offered in a variety of materials to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Designed to isolate the pressure measuring instrument from corrosive or viscous process mediaUtilize an all welded, all metallic housing design to eliminate potential leak pathsFor use with gauges with dial sizes of 2-1/2" and smaller, and pressure ranges no less than 100 psigHousing and diaphragm offered in a variety of materials to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
Designed for applications requiring an NPT male threaded process connection and with a flush diaphragmFlush diaphragm construction prevents clogging and process material build-upConstructed with a 316 Stainless Steel housing and diaphragm for strength and durabilityAvailable instrument connection sizes are 1/4” and 1/2" with a process connection size of 1/2" NPT male to 2" NPT male
Features a flush mount diaphragm and all welded construction, ideal for food & beverage, pharmaceutical and sanitary marketsCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowWetted parts and all welded housing are constructed of 316 Stainless Steel for greater strength and durabilityAccommodates process connection pipes from 1-1/2" through 3" sizesClamped connection allows ease of installation and removal of seal for maintenance and cleaning
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
An off-line seal with a threaded connection and all welded, all metallic housing design that does not utilize an o-ring or gasketCan be used for remote mounting of pressure instrument(s) with capillary, see options & accessories belowDesigned with a larger diameter diaphragm for higher displacement capabilityA variety of upper and lower housing and diaphragm materials are available to suit most applicationsA flushing port is available to clean wetted areas and prevent process media build up
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About NISCO Inc.
NISCO offers a wide range of pressure gauges & instruments, diaphragm seals, thermometers, valves, and flow control products to the industrial and commercial marketplaces, as well as other resellers like ourselves. We can also provide other value-added services such as gauge repair, NIST traceable calibration, diaphragm seal assembly, and valve automation. NISCO takes pride in providing extensive product knowledge, helpful customer service, and market competitive pricing to help fit whatever need you may have because it is our goal to be regarded by our customers as the best supplier of pressure, temperature, and flow control products.