Flanged Connection with Screwed Diaphragm

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
The image is for reference; the actual product willbe based on your custom specifications.

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.

Specifications

Type of process connection	ANSI/ASME B16.5, JIS, DIN 2527
Nominal diameter	1/2", 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 temperature	0℃ ... 80℃, 81℃ ... 200℃, 201℃ ... 400℃
Others	Welded with instrument, flush port, coating (PTFE, PFA), lining (metal or PTFE), capillary, cooling element