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Diaphragm Seals

• Diaphragm Seals (Overview)
• Thermal Bias Calculations
• Type 10 Standard Diaphragm Seals
• Type 10L Non-Metallic Lower Housing, Reduced Pressure Diaphragm Seals
• Type 10H Elevated Pressure Diaphragm Seals
• Type 12 Tri-Clamp Sanitary Pressure Diaphragm Seals
• Type 20 Front Flush Button Style All Welded Diaphragm Seals
• Type 25 Standard Diaphragm Seals
• Type 25H Elevated Pressure Diaphragm Seals
• Type 29 High Displacement Diaphragm Seals
• Type 30 Standard Pressure Welded Diaphragm Seals
• Type 30H Elevated Pressure Welded Diaphragm Seals
• Type 30L Reduced Pressure Welded Diaphragm Seals

Diaphragm Seals (Overview)

• Designed to isolate the pressure measuring instrument from corrosive or viscous process media
• Metallic and non-metallic materials avaiable
• Consider gauge size, pressure range, media composition, ambient and operating temperature, and maximum working pressure when selecting
• For process temperature over 212°F, a capillary is recommended
• Fill Fluid must be compatible with process media; i.e. Glycerine may become volatile in conjunction with a strong oxidizing agent such as chlorine, forms of oxygen or peroxide and nitric acids

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Type 10 Standard Diaphragm Seals
1 Year Warranty

• Type 10

  Designed to utilize a replaceable diaphragm clamped between the metal housings
• Specifications:
  • UPPER HOUSING: Carbon steel or 316 Stainless steel
  • LOWER HOUSING: All metallic
  • DIAPHRAGM MATERIALS: All metallic or elastomers
  • O-RING: Buna-N®, Teflon®, Viton®
  • BOLTING: Carbon steel or 300 series Stainless steel

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Type 10L Non-Metallic Lower Housing, Reduced Pressure Diaphragm Seals
1 Year Warranty

• Type 10L

  Utilize a replaceable diaphragm and non-metallic lower housing
• Rated to 200 psi with a displacement capability of 0.09 cubic inches
• Specifications:
  • UPPER HOUSING: Carbon steel or 316 Stainless steel
  • LOWER HOUSING: All non-metallic
  • DIAPHRAGM MATERIALS: All metallic or elastomers
  • O-RING: Buna-N®, Teflon®, Viton®
  • BOLTING: Carbon steel or 300 series Stainless steel

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Type 10H Elevated Pressure Diaphragm Seals
1 Year Warranty

• Type 10H

  A threaded connection, off-line seal with a replaceable diaphragm
• Designed for high pressure applications
• Type 10H rated up to 5,000 psi, Type 10H1 rated up to 10,000 psi
• Displacement capability is 0.05 cubic inches
• Specifications:
  • UPPER HOUSING: Carbon steel or 316 Stainless steel
  • LOWER HOUSING: All metallic
  • DIAPHRAGM MATERIALS: All metallic
  • O-RING: Buna-N®, Viton®
  • BOLTING: Carbon steel or 300 series Stainless steel

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Type 12 Tri-Clamp Sanitary Pressure Diaphragm Seals
1 Year Warranty

• Type 12

  Features a flush mount diaphragm and all welded construction – ideal for food & beverage, pharmaceutical and sanitary markets
• Minimum working pressure -30 inHg to 0 psig through -30 inHg to 600 psig
• Accommodates process connection pipes from 1-1/2 inch through 3 inch sizes
• Accommodates 2-1/2, 4, 4-1/2 and 6 inch gauge sizes
• Clamped connection allows ease of installation and removal of seal for maintenance and cleaning
• Wetted materials polished to Ra 20 or better
• Specifications:
• UPPER HOUSING: 316 stainless steel
• DIAPHRAGM MATERIALS: 316 stainless steel
• STAINLESS STEEL LADISH TRI-CLAMP: 1-1/2, 2, 2-1/2 and 3 inch options
• GASKET: Buna-N®, Teflon®
• CAUTION: NOSHOK pressure transmitters or transducers are not to be used in heat sterilization systems as stated in 3A Standard 74-03 paragraph D10.1.2
• CAUTION: Diaphragm seal must be installed facing downward or in a vertical position for drainability. Do not install diaphragm seal facing in an upward position.

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Type 20 Front Flush Button Style All Welded Diaphragm Seals
1 Year Warranty

• Type 20

  Constructed with a 316 Stainless steel housing and diaphragm
• Maximum pressure rating is 9,000 psi
• Available instrument connection sizes are 1/4” and 1/2" NPT with a process connection size of 1/2" NPT male to 2" NPT male
• Specifications:
  • HOUSING: 316 Stainless steel
  • DIAPHRAGM MATERIALS: 316 Stainless steel

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Type 25 Standard Diaphragm Seals
1 Year Warranty

• Type 25

  Utilize an all welded, all metallic housing design
• Pressure rated to 2,500 psi
• Housing and diaphragm offered in a variety of materials to suit most applications
• A flushing port is offered as an option
• Specifications:
  • UPPER HOUSING: 316 Stainless steel, Carpenter 20™  and Monel®
  • LOWER HOUSING: 316 Stainless steel, Hastelloy C, Hastelloy B, Carpenter 20™ and Monel®
  • DIAPHRAGM MATERIALS: 316 Stainless steel, Hastelloy C, Hastelloy B,
    Carpenter 20™  and Monel®

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Type 25H Elevated Pressure Diaphragm Seals
1 Year Warranty

• Type 25H

  Utilize an all welded, all metallic housing design
• Pressure rated to 5,000 psi
• Housing and diaphragm offered in a variety of materials to suit most applications
• A flushing port is offered as an option
• Specifications:
  • UPPER HOUSING: 316 Stainless steel, Carpenter 20™  and Monel®
  • LOWER HOUSING: 316 Stainless steel, Hastelloy C, Hastelloy B, Carpenter 20™  and Monel®
  • DIAPHRAGM MATERIALS: 316 Stainless steel, Hastelloy C, Hastelloy B,
    Carpenter 20™  and Monel®

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Type 29 High Displacement Diaphragm Seals
1 Year Warranty

• Type 29

  All welded, all metallic housing design does not utilize an o-ring or gasket
• Displacement is limited to 0.035 cubic inches, requiring the use of gauges with less than 4-1/2" dial size and bourdon tube range no lower than 0 to 15 psi
• Pressure rating is 2,500 psi
• Specifications:
  • UPPER HOUSING: 316 Stainless steel and Monel®
  • LOWER HOUSING: 316 Stainless steel, Hastelloy C, Hastelloy B and Monel®
  • DIAPHRAGM MATERIALS: 316 Stainless steel, Hastelloy C, Hastelloy B and Monel®

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Type 30 Standard Pressure Welded Diaphragm Seals
1 Year Warranty

• Type 30

  Utilize an all metallic diaphragm welded to the upper housing
• Displacement capability is 0.05 cubic inches
• Standard pressure rating is 2,500 psi
• A wide variety of instrument and process connections are available
• A flushing connection is offered as an option
• Specifications:
  • UPPER HOUSING: Carbon steel, 316 Stainless steel, Monel® 400, Titanium (Grade 4)
  • LOWER HOUSING: Carbon steel, 316 Stainless steel, Monel® 400, Hastelloy C,
    Inconel 600™, Titanium (Grade 4)
  • DIAPHRAGM MATERIALS: 316 Stainless steel, Monel® 400, Hastelloy C, Inconel 600, Titanium (Grade 4), Tantalum
  • BOLTING: Carbon steel or 300 series Stainless steel
  • GASKET: CGR 2750, Teflon®, Viton®

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Type 30H Elevated Pressure Welded Diaphragm Seals
1 Year Warranty

• Type 30H

  Utilize an all metallic diaphragm welded to the upper housing
• Displacement capability is 0.05 cubic inches
• Type 30H rated up to 5,000 psi, type 30H1 rated up to 10,000 psi
• A wide variety of instrument and process connections are available
• A flushing connection is offered as an option
• Specifications:
  • UPPER HOUSING: Carbon steel, 316 Stainless steel, Monel® 400, Titanium (Grade 4)
  • LOWER HOUSING: Carbon steel, 316 Stainless steel, Monel® 400, Hastelloy C
  • DIAPHRAGM MATERIALS: All metallic
  • BOLTING: Carbon steel or 300 series Stainless steel
  • GASKET: Silver-plated Stainless steel, silver-plated Hastelloy C

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Type 30L Reduced Pressure Welded Diaphragm Seals
1 Year Warranty

• Type 30L

  Utilize an all metallic diaphragm welded to the upper housing
• Displacement capability is 0.05 cubic inches with a 2.4" diameter diaphragm
• Maximum pressure rating is 200 psi with non-metallic lower housing materials
• A flushing connection is offered as an option
• Specifications:
  • UPPER HOUSING: Carbon steel, 316 Stainless steel, Monel® 400, Titanium (Grade 4)
  • LOWER HOUSING: Kynar, Polypropylene, PVC, Teflon, Viton
  • DIAPHRAGM MATERIALS: 316 Stainless steel, Hastelloy C, Monel® 400, Titanium (Grade 4), Inconel 600™, Tantalum
  • BOLTING: Carbon steel or 300 series Stainless steel
  • GASKET: CGR 2750, Teflon®, Viton®

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