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SJ Gauge pressure gauge with a metal dual-diaphragm assembly

Flanged Connection with Dual Diaphragm

Model: DIF-S
  • Lower pressure ranges can be measured to meet pipeline connection needs and accuracy
  • An alternative when flange diaphragm seal – “I” section type cannot be used due to lack of space
  • Applicable for strict working environments including biogas, oil, gas fracking and biodiesel, etc
  • Responsive after-sales service / Customizable
  • High quality / One-year warranty
  • Product images are for reference only. Final specifications are based on the confirmed order.
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Description

The DIF-S features a dual-diaphragm structure that allows accurate measurement in lower pressure ranges, making it an ideal solution where traditional “I-section” flange diaphragm seals cannot be installed due to limited space. It is designed for harsh media such as biogas, crude oil, gas-fracking fluids, and biodiesel applications. Compatible with ANSI/ASME, JIS, and DIN2527 flanges, the DIF-S supports both pressure gauges and transmitters, with optional flush ports and metal or PTFE linings for enhanced corrosion resistance and easy maintenance.

Downloads

English

SJ-Gauge-DIF-S-diaphragm-seal-datasheet-en

Tradtional Chinese

SJ-Gauge-DIF-S-diaphragm-seal-datasheet-zh-tw

Specifications

Type of process connectionANSI/ASME B16.5, JIS, DIN 2527
Nominal diameter​1/2", 3/4", 1", 1 1/4"
Instrument connection
  • 1/4, 3/8, 1/2
  • PT, G, NPT, M
Scale ranges
  • Pressure gauge:
  • 1/2", 3/4": 0 ... 4 bar to 0 ... 40 bar
  • 1", 1 1/4": -1 ... 3 bar, 0 … 2.5 bar to 0 ... 40 bar
  • Transmitter:
  • 1/2", 3/4": 0 ... 0.4 bar to 0 ... 40 bar
  • 1", 1 1/4": -1 ... 0.6 bar, 0 ... 2.5 bar to 0 ... 40 bar
  • or all other equivalent vacuum or combined pressure and vacuum ranges
Material
  • Upper body: 304 SS, 316 SS, 316L SS, Dual phase steel, Hastelloy C276, Tantalum, Titanium, Monel 400, Nickel 200
  • Lower body: 304 SS, 316 SS, 316L SS, Dual phase steel, Hastelloy C276, Tantalum, Titanium, Monel 400, Nickel 200
  • Diaphragm: 316L SS, PTFE, Hastelloy C276, Titaniuｍ, Tantalum, Monel 400, Nickel 200, Silicone, Viton, 316L+PTFE Coating
Medium temperature0℃ ... 80℃, 81℃ ... 200℃, 201℃ ... 400℃
OthersWelded with instrument, flush port, coating (PTFE or PFA), lining (metal or PTFE), capillary, cooling element

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