Flanged Connection

Screw type or welding type can be selected according to size requirements
Used for sewage or fluids with difficult properties such as corrosive, high temperature, or crystallization
Applicable for strict working environments including pharmaceuticals, chemical and petrochemical processing, etc.

Responsive after-sales service / Customizable /
High quality / One-year warranty
The image is for reference; the actual product willbe based on your custom specifications.

Description

The DIF flanged diaphragm seal is available in both welded and screwed types, allowing flexible selection based on installation size and process requirements. It is designed for challenging media such as corrosive fluids, high-temperature liquids, crystallizing substances, and sewage, making it ideal for demanding industries including pharmaceutical, chemical, and petrochemical applications. Compatible with ANSI/ASME, JIS, and DIN flange standards, it can be paired with pressure gauges or transmitters. With a wide choice of materials—304/316L, Hastelloy, Monel, Titanium, Tantalum, and more—the DIF provides a dependable pressure isolation solution for harsh operating environments.

Specifications

Type	Welded, screwed
Type of process connection	ANSI/ ASME B16.5, JIS, DIN2527
Nominal diameter	Welded: 1/2", 3/4", 1", 1 1/4", 1 1/2", 2" Screwed: 2", 3", 4"
Instrument connection	1/4, 3/8, 1/2 PT, G, NPT, M
Scale ranges- welded	Pressure gauge: 1/2", 3/4": 0 ... 4 bar to 0 ... 40bar 1", 1 1/4": -1 ... 3 bar, 0 ... 2.5 bar to 0 ... 40 bar 1 1/2", 2": -1 ... 1.5 bar 0 ... 1.6 bar to 0 ... 40 bar Transmitter: 1/2", 3/4": 0 ... 0.3 bar to 0 ... 40bar 1", 1 1/4": -1 ... 0.6 bar, 0 ... 0.25 bar to 0 ... 40 bar 1 1/2", 2": -1 ... 0.6 bar, 0 ... 0.1 bar to 0 ... 40 bar or all other equivalent vacuum or combined pressure and vacuum ranges
Scale ranges - screwed	Pressure gauge: -1 ... 1.5 bar, 0 ... 0.6 bar to 0 ... 40 bar Transmitter: -1 ... 0.6 bar, 0 ... 0.25 bar to 0 ... 40 bar or all other equivalent vacuum or combined pressure and vacuum ranges
Vật liệu	Body: 304 SS, 316 SS, 316L SS, Hastelloy C276, Dual phase steel, Tantalum, Monel 400, Titanium, Nickel 200 Diaphragm - welded: 316L SS, Hastelloy C276, Tantalum, Monel 400, Titanium, Nickel 200 Diaphragm - screwed: 316L SS, Hastelloy C276, Tantalum, Monel 400, Titanium, Nickel 200, Silicone, Viton, 316L+PTFE, 316L+PTFE Coating, PTFE
Medium temperature	0°C ... 80°C, 81°C ... 200°C, 201°C ... 400°C
Others	Welded with instrument, flush port, coating (PTFE, PFA), lining (metal or PTFE), capillary, cooling element