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SJ Gauge pressure gauge with metal-plastic stub pipe diaphragm seal

Flanged Connection with Stub Pipe, Upper Metal, Lower Plastic

Model: DIFF-USLP
  • Enlarged upper seat and diaphragm to enhance accuracy and meet the requirements for pipeline connections
  • The material of diaphragm or dual diaphragm can be different from the main body
  • Ideal for industries such as electroplating, chemical and petrochemical processing, 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-USLP diaphragm seal features a metal upper body combined with a plastic lower chamber, making it ideal for corrosive or contaminated media in chemical processing, electroplating, and petrochemical applications. The upper section is available in stainless steel, Hastelloy C276, Titanium, Tantalum, and other high-performance alloys, while the lower section offers PP, PVC, PVDF, or PTFE for excellent corrosion resistance and reduced weight. Its enlarged upper seat and diaphragm improve pressure transmission accuracy and ensure compatibility with various piping standards. Supporting both pressure gauges and transmitters, the DIF-USLP accommodates multiple diaphragm sizes (70–160 mm) and international flange standards (ANSI, JIS, DIN). It is especially suitable for acidic/alkaline solutions, wastewater treatment, plating liquids, and aggressive chemicals, with optional welded-type construction and PTFE/PFA coating for easier maintenance and extended durability.

Product Images

DIFF-USLP | Flanged Connection with Stub Pipe, Upper Metal, Lower Plastic
DIFF-USLP | Flanged Connection with Stub Pipe, Upper Metal, Lower Plastic

Downloads

English

SJ_DIFF-USLP_cc_(en)_metal_plastic_seal

Traditional Chinese

SJ_DIFF-USLP_cc_(ch)_metal_plastic_seal

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, 130 mm, 160 mm
Instrument connection
  • 1/4", 3/8", 1/2"
  • PT, G, NPT, M
Scale ranges
  • 90 mm
  • Pressure gauge: -1 … 1.5 bar, 0 ... 0.6 bar to 0 … 10 bar
  • Transmitter: -1 … 0.6 bar, 0 ... 0.1 bar to 0 … 10 bar
  • 130 mm
  • Pressure gauge: -1 ... 0.6 bar, 0 … 0.25 bar to 0 … 10 bar
  • Transmitter: -1 … 0.6 bar, 0 ... 0.1 bar to 0 … 10 bar
  • 160 mm
  • Pressure gauge: -0.1 … 0.1, 0 ... 0.1 bar to 0 … 10 bar
  • Transmitter: -0.05 … 0.05 bar to 0 … 10 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:
  • PP, PVC, PVDF, PTFE
  • Diaphragm:
  • PTFE, Hastelloy C276, Titanium, Tantalum, Monel 400, Nickel 200, Silicone, Viton, 316L+PTFE, 316L+PTFE Coating
Medium temperature0℃ ... 60℃ (PVC), 0℃ ... 80℃ (PP), -40℃ ... 120℃ (PVDF), -200℃...240℃ (PTFE)
Case fillingPFPE, silicone oil
OthersWelded with instrument, coating (PTFE or PFA)

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