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SJ Gauge pressure gauge with welded diaphragm stub seal

Flanged Connection with Stub Pipe, Welded Diaphragm

Model: DIFF-W
  • Optimizable through the adjustment of the upper seat and diaphragm sizes for precision and to meet the criteria for pipeline connections
  • The short pipe length on the lower body can be manufactured to match the piping’s thermal-insulation requirements.
  • Durability for working environments using liquids that are high temperature, corrosive, sewage, or prone to crystallization
  • 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 DIFF-W welded diaphragm seal features a flanged connection with a stub-pipe structure, providing strong durability and stable pressure transmission in harsh industrial conditions. Its fully welded diaphragm design ensures excellent sealing performance, making it ideal for applications involving high-temperature fluids, corrosive chemicals, sewage, crystallizing media, and other challenging process environments.

Engineered with adjustable upper-seat and diaphragm configurations, the DIFF-W can be optimized to match various pipeline standards and measurement accuracy requirements. It is widely used in electroplating systems, wastewater treatment plants, chemical and petrochemical industries—where corrosion resistance, reliability, and clog-free operation are essential.

Supporting diaphragm sizes of 70 mm and 90 mm, the DIFF-W is compatible with both pressure gauges and transmitters and is available in a wide selection of materials, including 316L stainless steel, Hastelloy C276, Tantalum, Titanium, Monel 400, and more. Optional designs such as flush ports and welded-with-instrument assemblies further enhance ease of maintenance and long-term operational stability.

Product Images

DIFF-W | Flanged Connection with Stub Pipe, Welded Diaphragm
DIFF-W | Flanged Connection with Stub Pipe, Welded Diaphragm

Downloads

English

SJ_DIFF-W_cc_(en)_welded_diaphragm

Traditional Chinese

SJ_DIFF-W_cc_(ch)_welded_diaphragm

Specifications

Type of process connectionANSI/ASME B16.5, JIS, DIN 2527
Nominal diameter1/2", 3/4", 1", 1 1/4", 1 1/2", 2"
Diaphragm diameter90 mm
Instrument connection
  • 1/4", 3/8", 1/2"
  • PT, G, NPT, M
Scale ranges
  • Pressure gauge: -1 … 1.5 bar, 0 ... 0.6 to 0 … 40 bar
  • Transmitter: -1 … 0.6 bar, 0 ... 0.1 to 0 … 40 bar
  • or all other equivalent vacuum or combined pressure and vacuum ranges
Material
  • Body:
  • 304 SS, 316 SS, 316L SS, Dual Phase Steel, Hastelloy C276, Tantalum, Titanium, Monel 400, Nickel 200
  • Diaphragm:
  • 316L SS, Hastelloy C276, Tantalum, Titanium, Monel 400, Nickel 200
Medium temperature0℃ ... 80℃ (standard), 81℃ ... 200℃, 201℃ ... 400℃
OthersWelded with instrument, flush port

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