Diaphragm Seals | Diaphragm Pressure Seals

Diaphragm seals create a flexible barrier to protect pressure measurement instruments from extreme operating temperatures and corrosive, abrasive, and toxic process media. These seals are made from metal or plastic and are available with either a threaded, flanged, or in-line connection.

Uses for diaphragm seals include pressure transducers and transmitters, and pressure switches and gauges. Applications and industries vary widely but typically include wastewater treatment facilities, offshore oil applications, pharmaceutical, food and beverage, and biotech.

Types of diaphragm pressure seals include:

  • Threaded diaphragm seals connect directly to the process instrumentation with an NPT connection.
  • Flanged connection diaphragm seals attach to the process instrumentation with either a raised, flat, or ring joint flange.  
  • In-line seals  are designed for use in full port flow-thru applications that would clog standard diaphragm seals.   

Diaphragm Seals for Pressure Instrumentation

Branom Instrument Co. provides diaphragm seals from several manufacturers, including WIKANOSHOK, Red Valve, and Winters. Our inventory includes replaceable and non-replaceable diaphragm seals in the following seal types:

  • Threaded Connection Diaphragm Seals
  • Flange Connection Diaphragm Seals
  • Sanitary Diaphragm Seals 
  • In-Line Diaphragm Seals

If you are unsure of which diaphragm seal is best for your application, our team will help you select and source the best option.

Contact us to Discuss Diaphragm Seals

Branom has decades of instrumentation experience and delivers high-quality products produced by the industry’s leading manufacturers. We carry an extensive inventory of diaphragm seals and other instrumentation and will help you source the right products for your testing needs. Contact us to discuss your application requirements.

Wika Instrument Lp
233.50 L990.12 Diaphragm/Seal Assembly w/KN21 Fill SS TAGS PG-300B-1

52951882

1,188.38 1,188.38 1188.38 USD
On Hand: 0
Wika Instrument Lp
WIKA 232.50 Series Gauge, 100mm CASE 0-100PSI, 1/2" BOTTOM CONNECTION, DRY, ADJ POINTER

9189459

208.89 208.89 208.89000000000001 USD
On Hand: 0
Marsh Bellofram Corporation
Marsh Pressure gauge, 3.5”dial, ¼” NPT lower mount, 0-15 PSI/KPA

J8040

41.79 41.79 41.79 USD
On Hand: 0
Marsh Bellofram Corporation
Marsh SEAL & FILL

B8498-22-3-G

115.22 115.22 115.22 USD
On Hand: 0
Wika Instrument Lp
AWS, All Welded System, M933.D1 100PSI

4217919-0001

474.58 474.58 474.58 USD
On Hand: 0
Wika Instrument Lp
WIKA 232.25 4.5 3000PSI 1/2 B

4235925

517.29 517.29 517.29 USD
On Hand: 0
Wika Instrument Lp
WIKA 232.25 6 3000PSI 1/2 B

4236424

738.45 738.45 738.45 USD
On Hand: 0
Wika Instrument Lp
WIKA 232.25 6 300PSI 1/2 B

4236351

672.36 672.36 672.36 USD
On Hand: 0
Wika Instrument Lp
Wika, AWS M933.D1 0-60psi, 1/2"NPT Male L.M.M933.D1.P060PX.LM.N4.SS.SS-0.SS.68.FGL

4221915-0002

474.58 474.58 474.58 USD
On Hand: 0
Harrington Industrial Plastics Llc
PLAST-O-MATIC CPVC DIAPHRAGM SEAL, 1/2" PROCESS, 1/4" INSTRUMENT, TEFLON DIAPHRAGM

GGTS1-CP

248.00 248.00 248.0 USD
On Hand: 2
Marsh Bellofram Corporation
Model 12000 Mini Servicable Rubber Diaphragm Seal, 1/4" PVC Upper, 1/2" PVC Lower, with Nitrile Diaphragm, No Fill

12000-52-54-3-00

191.39 191.39 191.39000000000001 USD
On Hand: 1
Marsh Bellofram Corporation
Model B8498 Gauge Protector with Rubber Diaphragm Seal

B8498-22-5-0

82.44 82.44 82.44 USD
On Hand: 0
Wika Instrument Lp
Wika, Diaphragm Seal Assembly, 4.5" 0-100psi 1/2" nptm

52442187

554.93 554.93 554.9300000000001 USD
On Hand: 0
Wika Instrument Lp
WIKA L990.10 Diaphragm Seal, 1/2"NPTF x 1"NPTF, All SS, 1/4"NPT Flushing Port, L990.10.N4FXN8F.SS.SS-2.SS.SS.BN.1500.PLG

52803288

731.68 731.68 731.6800000000001 USD
On Hand: 0
Wika Instrument Lp
L990.10-N4FxN4F.SS.SS-2.CS.SS.VI.1500

50372211

538.69 538.69 538.69 USD
On Hand: 4