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Type 25 Welded Diaphragm Seal, Standard Pressure, 1/4" NPT Instrument Conn, 316 Stainless Steel, 316 Stainless Steel Diaphragm, 1/4" NPT Process Conn, 316 Stainless Steel

Featured Specifications

Instrument Connection Size

1/4" NPT

Diaphragm Material

316 Stainless Steel

Process Connection

1/4" NPT

Assets

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Product Specifications|Instruments|O-Ring Temperature Limits|Diaphragm Pressure and Temperature Limits|Additional Information|Options and Accessories|Applications|Limitations Which Apply Are|Prop 65 Warnings

Product Specifications

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Type
Diaphragm Seal
Style
Non-Replaceable Diaphragm Seal
Instrument Connection
1/4" NPT
Upper Housing Material
316 Stainless Steel
Diaphragm Material
316 Stainless Steel
Process Connection
1/4" NPT
Seal Type
Threaded with welded diaphragm
Lower Housing Flushing Port
Optional 1/8" NPT and 1/4" NPT
Instrument Type
Gauges, Transducers, Switches
Instrument Gauge Size
2-1/2 in
Upper Housing Type
Non-Continuous Duty
Diaphragm Size
1.28 in
Diaphragm Displacement
400 mm³
Warranty
1 yr

O-Ring Temperature Limits

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O-Ring Temperature Limit_ºF
-400 to 400 ºF

Diaphragm Pressure and Temperature Limits

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Diaphragm Lower Housing Material Pressure and Temperature Limits
Metallic diaphragms determined by pressure range of seal type, restricted to temperature range of fill fluid.
Diaphragm Temperature Limits for Polytetrafluoroethylene (PTFE) Material ºF
-40 to 400 ºF
Diaphragm Temperature Limits for Fluorocarbon (FKM) Material ºF
-10 to 400 ºF

Additional Information

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Additional Information
  • Consider instrument size, pressure range, media composition, ambient and operating temperature, and maximum working pressure when selecting
  • Capillaries and cooling elements are available for elevated process temperatures, see options & accessories below
  • Fill fluid must be compatible with process media; i.e. Glycerin may become volatile in conjunction with a strong oxidizing agent such as chlorine, forms of  oxygen or peroxide and nitric acids

Options and Accessories

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Cooling Elements
  • 1/4" NPT x 1/4" NPT Cooling Element (1/4" NPT x 1/4" NPT-CE)
  • 1/2" NPT x 1/2" NPT Cooling Element (1/2" NPT x 1/2" NPT-CE)
  • Works in combination with diaphragm seal to isolate instrument from high media temperatures
  • Recommended for process temperatures above 212 ºF
  • Requires direct mounted system
  • Effective temperature reductions of 200 ºF depending upon ambient conditions
  • High > 212 ºF process temperature, low < -40 ºF process temperature
  • All Stainless Steel construction
Diaphragm Seal Fill Options
  • Glycerin (GY) Not recommended for use in vacuum applications.)
  • Silicone (SL)
  • Halocarbon® (HL)
  • Neobee M20 (NB)
  • Mineral Oil (MO)
  • Propylene Glycol (PG)
Distribution Manifolds
NOSHOK's Distribution Manifolds connect multiple instruments to one diaphragm seal, eliminating multiple connections that lead to possible leak paths.
Plain and Armored Capillaries
  • 5 ft. SS Armored Flexible Capillary, 1/4" NPT (AC-02-02-5) per ft. adder (AC-02-02-#)
  • 5 ft. SS Armored Flexible Capillary, 1/2" NPT (AC-04-04-5) per ft. adder (AC-04-04-#)
  • Stainless Steel capillaries available with or without Stainless Steel armor
  • Protects the instrument from high or low process temperatures
  • Allows remote mounting of pressure instrument(s)
  • Select the shortest capillary length possible, as changes in ambient temperature conditions may significantly affect the accuracy and response time of the instrument
  • Standard length 5', others available
  • Installation on analog gauges requires a gauge support and gauge adaptor, or other surface mounting provisions
  • Any level difference between the instrument and the seal will result in a pressure indication error; make sure to compensate for the level difference during calibration of the diaphragm seal assembly if the level difference is known
  • Filling options for capillaries
    • Silicone - specify to 10 or 20 feet (SL-C)
    • Halocarbon® - specify to 10 or 20 feet (HL-C)
Maximum Pressure
0 to 2,500
Minimum Pressure
Switches: 0 to 60, Gauges 2-1/2 in: 0 to 100, Transducers: 0 to 60

Applications

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Application
  • Water and wastewater
  • Oil and gas
  • Petrochemical
  • Chemical processing
  • Industrial automation
  • Marine
  • Agriculture
  • Steel fabrication
  • Mud pumping
  • Pulp and paper
  • Pneumatic

Limitations Which Apply Are

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Limitations Which Apply Are
These units must be operated within the catalogued environmental and application parameters. Determination of failure will be made by NOSHOK, Inc.'s equipment and personnel or a certified test facility specializing in this type of evaluation. Gauge failures determined to be caused by over-range, incompatibility with environment or product media and abuse will not be considered under this warranty. NOSHOK, Inc. will, at its discretion, repair or replace the working parts of the damaged gauge without cost to the customer.

In keeping with and for purposes of product and/or manufacturing process improvements, NOSHOK, Inc. reserves the right to make design changes without prior notice.

Prop 65 Warnings

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Prop 65 Warnings
⚠️ WARNING: This product can expose you to chemicals including Nickel, which is known to the State of California to cause cancer.  For more information go to www.P65Warnings.ca.gov