Haygor Instrument and Company, Inc.
Haygor Instrument & Company, Inc. started in 1973 as a small job shop in Pasadena, Texas. Since then, we’ve grown into a globally recognized name in diaphragm seal manufacturing and process instrumentation services.
In 2017, Allen Bishop—who had spent decades working his way up through the company—took the reins from founder George Bishop. Today, Allen continues to lead Haygor with a clear vision: drive innovation, deliver exceptional service, and put customers first. Haygor remains proudly privately owned, with locations in Houston, Pasadena, and Bridge City, Texas. Our headquarters are now based at our expanded Preston facility in Pasadena.
Diaphragm Seal Manufacturing & Innovation
We’re known for building high-quality diaphragm seal assemblies—custom or standard—that serve industries around the world. Whether you need a single engineered solution or a full-scale production run, we’re ready to deliver with speed and precision.
Our experience with transmitters, gauges, controllers, and other instrumentation allows us to engineer diaphragm seals that consistently perform in even the most demanding environments. Accuracy, durability, and reliability are at the core of every seal we produce.
Process Instrumentation Repairs & Sales
Before diaphragm seals became our specialty, we built our reputation on instrumentation. That legacy still drives us. We offer sales, repairs, and service for process instrumentation used across petrochemical, oil & gas, cryogenic, and medical industries.
Our services include:
• New and remanufactured transmitters and controllers
• Gauge and chart recorder solutions
• Valve positioners and actuators
• NIST-traceable calibrations
• Oxygen and chlorine service cleaning
• Custom machining, welding, and fabrication
From extending the life of your equipment to tracking down hard-to-find components, our team is here to help.
Why Customers Choose Haygor
Our goal isn’t just to sell products, it’s to remove roadblocks and make your job easier. Here’s what you can expect when working with us:
• Innovative – We bring patented solutions and creative thinking to the table
• Fast – With some of the quickest lead times in the industry
• Reliable – Our quality stands up under pressure
• Easy to Work With – We believe doing business should be simple
Our Core Values
• Pride – In the work we do and the products we deliver
• Accountability – We own our actions and results
• Trustworthiness – Built through honesty and follow-through
• Hard Work – Backed by a can-do attitude and hands-on effort
Our North Star Customer Happiness Above All Else.
We measure our success by how well we serve you. That’s the heart of everything we do.
Let’s Work Together Haygor is committed to being the easiest diaphragm seal and instrumentation partner you’ve ever worked with. If you're looking for reliable performance, faster turnaround, and real expertise—reach out anytime. We're here 24/7.