01

Shand & Jurs 94261 Vapor Recovery Regulator

Bidirectional Vapor Recovery Regulator

Get a Quote ↵

Shand & Jurs 94261 Vapor Recovery Regulator

For terminal operators, emissions engineers, and closed-vent-system designers, the Shand & Jurs 94261 Vapor Recovery Regulator controls tank pressure before atmospheric relief devices engage, routing routine breathing vapors into a recovery header instead of releasing them through conservation vents.

Unlike relying on conservation vents to cycle continuously as tanks breathe, the 94261 holds the vapor space within approximately ±0.1 in. W.C. across a typical 0.1–2 in. W.C. range, so pallets only open on genuine excursions rather than on every thermal or pump-in event.

A weight-balanced float sensing assembly provides fully mechanical, bidirectional regulation: the valve opens to the recovery header when pressure rises above setpoint and admits gas when vacuum develops. Calibrated weights tune the setpoint in the field, without utilities or instrumentation.

Stabilizing the vapor space before relief activation shifts routine breathing away from atmospheric discharge, cutting continuous emissions, preserving stored product, and converting conservation vents into true emergency-only devices with longer service intervals.

Shand & Jurs 94261
Shand & Jurs 94261 Vapor Recovery Regulator
02

Features

Weight-Balanced Float Sensing

Maintains a tight control band of approximately ±0.1 in. W.C., preventing oscillation near relief setpoints and eliminating nuisance cycling.

Bidirectional Regulating Valve

Routes vapor to the recovery header on pressure rise and admits gas under vacuum, stabilizing the tank vapor space in both directions.

Fully Self-Actuated Operation

Operates without electricity, air supply, or control instrumentation, giving predictable regulation in remote or utility-limited storage installations.

Calibrated Weight Adjustment

Allows precise field tuning of the pressure control range by swapping calibrated weights, with no actuator, positioner, or controller.

Upstream Pressure Architecture

Regulates tank pressure ahead of the conservation vent so pallets only open on genuine excursions, extending rebuild intervals.

Low-Wear Mechanical Linkage

Reduced moving-part design minimizes mechanical wear and sticking in low-pressure service, supporting long intervals between inspections.

Applications

  • Vapor Recovery Systems: Keeps routine tank breathing inside a closed-vent recovery header instead of atmospheric discharge, preserving product and reducing reported emissions.
  • Terminal Storage: Stabilizes pressure on gasoline, distillate, and finished-product tanks so pallets stop cycling on every pump-in or thermal swing.
  • Chemical Tanks: Controls vapor space pressure on solvent and specialty-chemical storage where routine atmospheric breathing carries odor, VOC, or product-loss exposure.
  • Wastewater Digesters: Holds digester headspace pressure steady so biogas is routed to capture rather than vented, limiting odor and methane release at the site.
  • Biofuel Storage: Suits ethanol, biodiesel, and renewable-fuel tanks where continuous breathing losses degrade yield and complicate emissions accounting and reporting.
  • Closed-Vent Tanks: Required upstream of conservation vents in closed-vent architectures so the relief device remains a true emergency backup rather than a routine path.
03

Specifications

Parameter

Specification

Device Type

Vapor recovery regulator (upstream of conservation vent)

Control Range

0.1 – 2 in. W.C.

Control Stability

Approximately ±0.1 in. W.C.

Regulation Type

Bidirectional pressure and vacuum

Operation

Fully self-actuated (no utilities or instrumentation)

Sensing

Weight-balanced float

Setpoint Adjustment

Calibrated weights

Installation

Upstream of the conservation vent

Service

Hydrocarbon and compatible vapors

Body and Seat

Steel

Float Assembly

Weighted mechanical float

Valve Assembly

Steel internal linkage

Seals

Service-compatible elastomer

Weights

Calibrated steel weights

Hardware

Stainless steel

Options

Alternate weight ranges; corrosion-resistant materials; multiple flange connections; low-temperature seals; protective coatings; service configuration selection (pressure, vacuum, or both)

Contact Support
2026 COST ESTIMATE

Contact Support

If you have questions not covered here, please contact the Cognesense support team for assistance.

Contact Us ↵

How does the 94261 differ from a conservation vent?

−

A conservation vent opens at a fixed setpoint and is designed as an emergency pressure/vacuum relief device. The 94261 sits upstream of the vent and regulates tank pressure across a controlled band of roughly ±0.1 in. W.C., routing routine breathing vapors to a recovery header rather than discharging them. The conservation vent remains in place as a true emergency backup that only opens on genuine excursions.

Does the regulator require utilities or instrumentation?

+

No. Operation is fully self-actuated. A weight-balanced float senses tank pressure and drives a bidirectional valve directly through calibrated weights, with no electricity, air supply, positioner, or controller. This supports use in remote terminals, unclassified areas, and sites with limited utility infrastructure.

How is the setpoint adjusted?

+

Setpoint is set by selecting calibrated weights on the float sensing assembly. Alternate weight ranges are available so the same base regulator can be tuned across the 0.1 to 2 in. W.C. control band without field-fabricating linkages or recalibrating actuators.

Where should the 94261 be installed on the tank?

+

The regulator is installed upstream of the conservation vent, between the tank vapor space and the vapor recovery header. This position lets the device control routine breathing into the recovery system while the existing conservation vent remains in place for emergency relief.

Is it suitable for chemical and wastewater service?

+

Yes, with appropriate material selection. Corrosion-resistant material options and low-temperature seals are available to match chemical, biofuel, and wastewater-digester vapor environments. Service-compatible elastomer seals, protective coatings, and multiple flange connections support integration into typical vapor-recovery piping layouts.

What operating benefit does the ±0.1 in. W.C. control band deliver?

+

Maintaining tank pressure within a narrow, predictable band prevents repetitive conservation-vent openings caused by small thermal and pump-induced pressure swings. That stability reduces pallet wear, lengthens vent inspection and rebuild intervals, lowers continuous emissions, and simplifies environmental reporting by keeping discharges out of the routine-operation path.

When should the 94270 Tank Blanketing Valve be specified instead?

+

The 94261 routes tank vapors to a recovery header. The Shand & Jurs 94270 Tank Blanketing Valve is the correct selection when the goal is inert-gas make-up service rather than vapor routing — for example, maintaining a nitrogen blanket over a moisture- or oxidation-sensitive product. The two products are complementary and commonly paired in closed-vent storage systems.

Summary

With over a century of tank-safety heritage inside Cognesense, the Shand & Jurs 94261 Vapor Recovery Regulator is chosen when routine breathing belongs in a recovery header rather than at atmosphere. Its weight-balanced float sensing and fully mechanical bidirectional valve hold tank pressure within a tight control band, extending conservation-vent life and cutting continuous emissions on terminal, chemical, biofuel, and digester storage alike. For closed-vent systems, it is trusted wherever you need to measure, monitor, and protect what matters most.

Bottom section image
Measure.
Monitor.
Protect.