EXTENDED NECK DIAPHRAGM SEAL

Extended neck design, Laser welded diaphragm, Optional exotic materials.

  • Range type: -1…0 bar up to 0…250 bar
  • Wetted parts: AISI 316L SS, Monel, Hastelloy C (others on request)
  • Sealing fluid: Silicon DC 200 (-40…205°C) (others on request)
  • Protection on wetted parts: Not Applicable
  • Assembly: Direct/Remote

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EXTENDED NECK DIAPHRAGM SEAL

Long‑Neck Isolation • Laser‑Welded Integrity • Perfect for Hot, Hard‑to‑Reach Process Taps

Engineered for Extreme Heat & Recessed Nozzles

The EXTENDED NECK DIAPHRAGM SEAL from AIMS Control solves two classic problems at once: it clears thick insulation / refractory linings and it distances sensitive instruments from punishing temperatures. A forged, one‑piece body with an elongated neck positions the diaphragm safely inside the process while your transmitter or gauge stays cool and accessible. Add a laser‑welded metallic diaphragm for leak‑free strength, and you get reliable isolation across ‑1 … 0 bar up to 0 … 250 bar—even in the hottest and most cramped installations.

Key Features & Benefits

Feature Advantage
Extended Neck Design Spans insulation or refractory, eliminating extra spool pieces and heat sinks.
Laser‑Welded Diaphragm Crevice‑free, fatigue‑proof weld for long service life under thermal cycling.
Exotic Alloy Options 316L SS standard; Monel 400 & Hastelloy C‑276 tame chlorides, sour gas, and strong acids.
Direct / Remote Assembly Mount transmitter directly or via SS‑armoured capillary (0.5 m – 10 m) for extra heat isolation.
Wide Pressure Window Drift‑free measurement from full vacuum to 250 bar.

Typical Applications

  • Steam & condensate lines wrapped in 150 mm insulation
  • Furnace / kiln pressure taps behind refractory brick
  • Molten bitumen or asphalt pipelines
  • Molten‑salt energy‑storage loops
  • Petrochemical reactors with radiant‑heat zones
  • High‑temperature pharmaceutical CIP/SIP kettles

Quality & Compliance

Each seal is helium‑leak tested (1 × 10⁻⁶ mbar‑L/s) and hydro‑proofed at 150 % rated pressure. ISO 9001 procedures, PED compliance, and EN 10204 3.1 traceability ensure inspection‑ready documentation.

Why Choose AIMS Control?

Produced by leading pressure gauge manufactures in Gujrat, India, AIMS Control delivers:

  1. Custom Neck Lengths & Alloys—fast, local machining to match your exact nozzle depth.
  2. Factory Assembly & Calibration—instruments shipped pre‑filled, vented, and zero‑checked.
  3. Responsive Engineering—help with fill‑fluid choice, flange ratings, and insulation setbacks.

Call to Action

Need a diaphragm seal that conquers heat and clears insulation?
Request a quote for the EXTENDED NECK DIAPHRAGM SEAL today, or chat with our engineers to specify neck length, alloy, and fill fluid for flawless, long‑life performance.

Related Products

  • Type: Welding Neck & Slip – On
  • Facing: Raised Face & Ring Joint
  • Size: 1” to 30″
  • Material: A | S | 304 SS / 316 SS / 316L SS / Monel 400 / Hastelloy
  • Pressure Taps: 2 (Standard)
  • Size: 1/2”, 3/4” (ANSI 300-600, 900,1500, 2500)
  • Max. flow rate: 200kg/min
  • Wetted parts: Stainless steel 316L
  • Sensor housing: Stainless steel 304
  • Fluid temperature: -200~200°C
  • Temp. Accuracy: ±1°C
  • Operating Voltage: AC85~265V, DC24V
  • Medium: Gas (except acetylene)
  • Pipe Range: DN100-DN4000, DN10-DN2000
  • Velocity: 0.1~120 Nm/s
  • Accuracy: ±1% , ±2.5%
  • Working Temperature: -40℃~+220℃
  • Working Pressure: ≤2.5 MPa, ≤4.0 MPa
  • Fluids Measured: Steam, Gases, and Liquids
  • Flow Range: 30:1 turndown
  • Liquids: 1.0 ft/s (0.3 m/s) Velocity Min. 30 ft/s (9.14 m/s) Velocity Max
  • Digital Communications: HART, Modbus, Profibus DP, Foundation Fieldbus, BACnet, USB, RS-232 Hazardous
  • Area Approvals: CE, cFMus, ATEX, PED, IECEx
  • Fluids Measured: Steam, Gases, and Liquids
  • Flow Range: 10:1 turndown
  • Accuracy: ±1.0% & ±1.5% &± 2.5%
  • Max. Process Temperature: 150℃ – 350℃
  • Nominal Operating Pressure: DN15DN50:4.0Mpa, DN65 DN200:1.6Mpa
  • Max. Pressure Rating: DN15:32Mpa; DN25:25Mpa; DN50:20Mpa, DN80:10Mpa; DN100:6.4Mpa, DN125 DN150:4.0Mpa
  • Size & Process Connection: DN4, 6, 10, 15, 20, 25, 32, 40; Thread connection, DN15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 200, Flange connection
  • Accuracy/Range ratio: ±0.5%R; 1:10; 1:15; 1:20
  • Sensor Material: SS304, SS316(L)
  • Output: Pulse, 4-20mA, HART
  • Power Supply: A: +24VDC, for 4-20mA , pulse, RS485 output
  • B: 3.6 V lithium battery, battery voltage: 2.0 V ~3.0 V

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