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Purpose-Built Transmitter Isolation

Purpose-built to protect the reading.

The only valve maker built exclusively around transmitter isolation. We replace the failure-prone knife-gate valves plants have always used with a purpose-engineered ball valve that simply works — and calibrates in place, without draining the tank.

See Why It’s Better → See Why It’s Better →
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FIG. 305 B
3″ full port
316 SS body
Calibrate-in-place
In service · Transmitter isolation
ZERO
Warranty claims since 1997
3″
Patented full-port design
1997
Family owned & operated
100%
Stainless construction
The Problem

Your knife-gate valve was never built for this.

Knife-gate valves were designed to stop bulk flow in a pipe — then pressed into isolating a sensitive instrument. That mismatch is why the same failures keep showing up on your maintenance tickets:

  • Packing failures that leak around the stem
  • Carbon-steel yokes that rot off in wet, corrosive plants
  • Product buildup that distorts pressure and level readings
  • Calibration that forces a tank drain-down or a full shutdown

We build a valve for exactly this job — and nothing else.

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 Fig. — Where the isolation valve sits: between the transmitter and the process line. Get this part wrong and every reading downstream is compromised. 
Repurposed vs. Purpose-Built

A valve built for one job beats a valve adapted to it.

The same 3″ flange. A completely different outcome on the plant floor.

⚠️ The status quo
Repurposed Knife-Gate Valve
  • ✕ Gate design leaves dead space where product builds up against the sensor
  • ✕ Stem packing wears and leaks under repeated actuation
  • ✕ Carbon-steel yokes corrode and fail in harsh service
  • ✕ Often requires draining the vessel to calibrate the transmitter
  • ✕ One niche SKU inside a catalog of hundreds — nobody’s specialty
✓ The Trans-Valve way
Purpose-Built Isolation Ball Valve
  • ✓ Patented 3″ full port gives the sensor a clean, unobstructed view
  • ✓ Quarter-turn, bubble-tight shutoff — no packing to fail
  • ✓ All-stainless body and wetted parts; nothing to rot off
  • ✓ Dedicated calibration port — calibrate in place, no drain-down
  • ✓ Built by the only team whose entire business is transmitter isolation
What Sets Us Apart

Four reasons plants switch —
and never switch back.

01

Purpose-Built, Not Repurposed

“A valve built for one job beats a valve adapted to it.”

We engineered our valve from the transmitter backward — a clean, full-port ball that gives the sensor an unobstructed view of the process and nowhere for product to hide.

02

Reliability You Can Prove

“Zero warranty claims since 1997. Zero.”

Reliability claims are cheap; a track record is not. Nearly three decades of purpose-built isolation valves in hard service, without a single warranty claim — all in stainless that won’t rot off.

03

Calibrate in Place, Stay in Production

“The best maintenance window is the one you never have to open.”

A dedicated purge and calibration port lets your techs verify the transmitter without draining the tank or interrupting the process — turning a planned shutdown into a routine check.

04

Drop-In Upgrade, Specialist Backing

“Upgrade the valve, not the whole installation.”

Our valves bolt to both existing knife-gate patterns and standard ANSI 150# flanges, so most switches are a straight swap. And when a job needs a custom body, material, or hard-to-find part, we build it.

Products Available

Specialty valves, built and stocked.

Three product families, decades of refinement, and the engineering range to build the one you can’t find anywhere else.

Isolation Ball Valves

Transmitter Isolation Ball Valves

Faster, stronger, cleaner. 3″ sensing port, ANSI 150# four-bolt and knife-gate mounting, single-port purge and calibrate-in-place. 316 / 317L stainless and Grade-5 titanium builds.

FIG. 305 B FIG. 305 LT FIG. 305 AT FIG. 105 / 115
Sampling Valves

Plunger-Style Sampling Valves

Spring-closed, plunger-type valves for taking bulk or batch samples from pipes and tanks. Reasonably priced, well built, and usually in stock — with seat options for any media.

FIG. 15 B NITRILE PEEK / PTFE UHMWPE / VITON
Custom Capabilities

Custom Valves & Hard-to-Find Parts

Pellet-service valves, high-pressure ball valves rated to 6,000 PSI, and sourcing for hard-to-find stems, balls, and soft goods — in CI, DI, stainless, titanium, Hastelloy, and Alloy 20.

PELLET SERVICE HIGH PRESSURE POA
Where We Work

Trusted wherever a reading runs the process.

If buildup, calibration, and corrosion are draining your maintenance hours, the application is ours.

Pulp & Paper

Buildup around level transmitters on digesters and stock lines.

Chemical Processing

Aggressive media that destroys repurposed gate valves.

Water & Wastewater

Reliable level isolation across clarifiers and treatment trains.

Mining

Abrasive slurries and harsh duty that demand stainless.

Food Processing

CIP-friendly purge ports and clean shutoff for sanitary lines.

Oil & Gas

Positive shutoff and exotic alloys for critical service.

Power Generation

Steam-drum and boiler level loops that can’t go offline.

Pharmaceutical

Validated, contamination-free isolation for regulated process.

Don't Just Take Our Word For It

The record, in the words of the plant floor.

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Installed worldwide · Process plants

“The Fig. 305 B corrected packing issues we were having with knife-gate isolation valves.”

— Maintenance, process plant

“The carbon-steel yokes rot off the older knife-gate valves. No worries with that now.”

— Reliability engineer

“Calibration in place really saves us a lot of time.”

— Instrumentation tech
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Zero warranty claims since 1997. Nearly three decades of purpose-built isolation valves in hard service — without a single claim. We'd rather show you the record than tell you about peace of mind.
Get the Facts

Stop re-buying the valve that was never built for this.

Get “8 Reasons Transmitter Isolation Ball Valves Outperform Knife-Gate Valves,” or talk to the team that does only this.

Get the Facts → Call +1 205.833.6864