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About

  • Designed to isolate the pressure measuring instrument from high temperatures, or corrosive or viscous process media
  • Can be used for remote mounting of pressure instrument(s) with capillary, see options & accessories below
  • Utilizes a replaceable diaphragm clamped between the flanged metal housings with an o-ring seal to create a leak-free union
  • Process connection sizes from 1/4" NPT through 1-1/2" NPT

Featured Specifications

Instrument Connection Size

1/2 in

Upper Housing Material

316 Stainless Steel

O-Rings Material

Nitrile Rubber (NBR)

Process Connection Size

1/2 in

Assets

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

Product Specifications

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Type
Diaphragm Seal
Style
Replaceable Diaphragm Seal
Process Connection
1/2" National Pipe Thread (NPT)
Seal Type
Threaded with replaceable diaphragm. Flanged available on request.
O-Rings Material
Nitrile Rubber (NBR)
Lower Housing Material
316 Stainless Steel
Upper Housing Material
316 Stainless Steel
Diaphragm Material
316 Stainless Steel
Flushing Connection Size
1/8 in
Flushing Connection Type
National Pipe Thread (NPT)
Instrument Connection
1/2" National Pipe Thread (NPT)
Instrument Gauge Size
2-1/2 to 6 in
Upper Housing Type
Continuous Duty
Diaphragm Size
2-1/2 in
Diaphragm Displacement
1.4 mL
Lower Housing Connection Size
  • 1/4
  • 1/2
  • 3/4
  • 1
  • 1-1/4
  • 1-1/2 in
Lower Housing Connection Type
National Pipe Thread (NPT)
Lower Housing Flushing Port
Optional 1/8" NPT, 1/4" NPT and dual ports
Bolting Material
Zinc-Plated Steel
Optional Bolting Material
Stainless Steel
Instrument Connection Type
National Pipe Thread (NPT)
Warranty
1 yr

O-Ring Temperature Limits

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O-Ring Temperature Limits for Nitrile Butadiene Rubber (NBR) Material ºF
-40 to 250 ºF
O-Ring Temperature Limits for Polytetrafluoroethylene (PTFE) Material ºF
-400 to 400 ºF
O-Ring Temperature Limits for Fluorocarbon (FKM) Material ºF
-10 to 400 ºF

Diaphragm Pressure and Temperature Limits

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Diaphragm Pressure Limits for Polytetrafluoroethylene (PTFE) Material
2,000 psi
Diaphragm Pressure Limits for Fluorocarbon (FKM) Material
2,000 psi
Diaphragm Temperature Limits for Polytetrafluoroethylene (PTFE) Material ºF
-40 to 400 ºF
Diaphragm Temperature Limits for Fluorocarbon (FKM) Material ºF
-10 to 400 ºF
Note for Diaphragm Pressure and Temperature Limits
Metallic diaphragms determined by pressure range of seal type, restricted to temperature range of fill fluid.

Bottom Housing Material Maximum Pressure and Temperature Limits

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Maximum Pressure Limits for Glass Transition Temperature (Tg), Tetoron Cotton (TC) Bottom Housing Material
200 psi
Maximum Pressure Limits for Polyvinylidene Fluoride (PVDF) Bottom Housing Material
200 psi
Maximum Pressure Limits for Polyvinyl Chloride (PVC) Bottom Housing Material
  • 80
  • 125
  • 200 psi
Maximum Pressure Limits for Polypropylene (PP) Bottom Housing Material
200 psi
Maximum Temperature Limits for Glass Transition Temperature (Tg), Tetoron Cotton (TC) Bottom Housing Material ºF
150 ºF
Maximum Temperature Limits for Polyvinylidene Fluoride (PVDF) Bottom Housing Material ºF
180 ºF
Maximum Temperature Limits for Polyvinyl Chloride (PVC) Bottom Housing Material ºF
  • 74
  • 125
  • 150 ºF
Maximum Temperature Limits for Polypropylene (PP) Bottom Housing Material ºF
140 ºF
Note for Maximum Pressure and Temperature Limits Bottom Housing Material
Metallic lower housings determined by pressure range of seal type, restricted to temperature range of fill fluid.

Additional Information

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Additional Information
  • Flushing port connection is an available option that allows the wetted areas of the seal to be cleaned, or the process vented without removing the unit from the line
  • 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)

Note

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Note
NBR O-Rings standard with 316SS diaphragm

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 Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov