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SJ Gauge diaphragm seal with threaded instrument connection and flanged process connection

Flanged Connection with Screwed Diaphragm

Model: DIF-DSR
  • Used for rigid working environments and corrosive fluids like high temperature, sewage, high process pressures, and crystallization
  • Various types and materials for diaphragm seal bodies that fit any kind of gauge upon request
  • The flush port provides easy cleaning/flushing due to process media being prone to clogging
  • Extremely high compatibility replacement for the WIKA 990.12
  • 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-DSR is a flanged diaphragm seal equipped with a screwed-type replaceable diaphragm, designed to handle harsh media such as corrosive fluids, high temperatures, crystallizing substances, and sewage. Highly suited for demanding applications in pharmaceutical, chemical, and petrochemical processing, it offers multiple material options and features a flush port for easy cleaning in clog-prone environments. It also provides excellent compatibility as a direct replacement for the WIKA 990.12 and can be paired with pressure gauges or transmitters for stable and reliable measurement.

Product Images

Diaphragm Seal Assembly for Differential Level Measurement
Diaphragm Seal Assembly for Differential Level Measurement
Pressure transmitter with diaphragm seal, flange connection
Pressure transmitter with diaphragm seal, flange connection
Pressure transmitter with diaphragm seal
Pressure transmitter with diaphragm seal

Downloads

English

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

Traditional Chinese

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

Specifications

Type of process connectionANSI/ASME B16.5, JIS, DIN 2527
Nominal diameter1/2", 3/4", 1", 1 1/4", 1 1/2"
Instrument connection
  • 1/4, 3/8, 1/2
  • PT, G, NPT, M
Scale ranges - metal diaphragm
  • Pressure gauge:
  • 1/2"、3/4": 0 ... 4 bar to 0 ... 40 bar
  • 1"、1 1/4": -1 ... 5 bar, 0 ... 4 bar 0 ... 40 bar
  • 1 1/2": -1 ... 3 bar, 0 ... 2.5 bar to 0 ... 40 bar
  • Transmitter:
  • 1/2"、3/4": 0 ... 0.6 bar to 0 ... 40 bar
  • 1"、1 1/4": -1 ... 1.5 bar, 0 ... 0.4 bar to 0 ... 40 bar
  • 1 1/2": -1 ... 0.6 bar, 0 ... 0.25 bar to 0 ... 40 bar
Scale ranges - PTFE diaphragm
  • Pressure gauge:
  • 1/2", 3/4": 0 ... 2.5 bar to 0 ... 40 bar
  • 1"、1 1/4": -1 ... 3 bar, 0 ... 1.6 bar to 0 ... 40 bar
  • 1 1/2": -1 ... 1.5 bar, 0 ... 0.6 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 ... 0.25 bar to 0 ... 40 bar
  • 1 1/2": -1 ... 0.6 bar, 0 ... 0.1 bar 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, Silicone, Viton, PTFE, 316L+PTFE Coating
Medium temperature0℃ ... 80℃, 81℃ ... 200℃, 201℃ ... 400℃
OthersWelded with instrument, flush port, coating (PTFE, PFA), lining (metal or PTFE), capillary, cooling element

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