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Shand & Jurs 94110 Vacuum Vent

Weight-Loaded Vacuum Vent

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Shand & Jurs 94110 Vacuum Vent

For tank designers, petroleum terminal engineers, and chemical storage specifiers, the Shand & Jurs 94110 provides vacuum relief for atmospheric storage tanks designed for low internal pressure, where liquid withdrawal or thermal contraction can create vacuum conditions that exceed allowable limits.

Unlike vacuum vents with fixed setpoints or limited material options, the 94110 supports aluminum, carbon steel, or 316 stainless steel bodies across a 2″ to 12″ size range, matching vent construction to vapor chemistry and operating temperature envelope without substituting device family.

A weight-loaded vacuum pallet delivers controlled lift and repeatable reseating under cyclic operating conditions. An air-cushion-seated FEP diaphragm enhances sealing integrity and resists adhesion from ice and gum formation, limiting nuisance air infiltration during non-vacuum operation. Standard vacuum settings are 0.5 oz/in².

Relief is sized using Shand & Jurs WinSize (EZ-Flow). Available with ANSI Class 150 RF or EN1092-1 PN10/PN16 flanged connections. For combined pressure and vacuum protection from a single nozzle, the 94110 can be paired with a 94640 Pressure Pilot-Operated Valve.

Shand & Jurs 94110
Shand & Jurs 94110 Vacuum Vent
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Features

Weight-Loaded Vacuum Pallet

Provides stable lift and repeatable reseating during routine tank breathing cycles, delivering predictable vacuum admission across cyclic operation without spring calibration drift.

Air-Cushion-Seated FEP Diaphragm

Resists adhesion from ice and gum formation at the seat; air-cushion seating limits nuisance air infiltration during non-vacuum operation and preserves reseating accuracy.

Standard 0.5 oz/in² Setting

Supports low-pressure atmospheric tank protection requirements, with higher settings available depending on size and pallet configuration for site-specific vacuum design envelopes.

Multi-Material Body Options

Aluminum, carbon steel, or 316 stainless steel body and seat match vapor chemistry and temperature, with service ranges up to +350°F on steel constructions.

2–12" Nominal Sizes

Covers common atmospheric storage tank nozzle dimensions across petroleum, chemical, and process applications, with screwed ends available on 2″ and 3″ sizes.

ANSI and EN Flange Interfaces

ANSI Class 125 FF or 150 RF plus EN1092-1 PN16 FF/RF aligns with refinery, chemical, and international piping without adapter spools.

Applications

  • Atmospheric Storage Tanks: Delivers vacuum relief on atmospheric tanks designed for low internal pressure where liquid withdrawal or thermal contraction creates vacuum conditions exceeding allowable structural limits.
  • Petroleum Terminal: Protects against vacuum-induced roof and shell damage on refined product, crude, and intermediate storage during rapid pump-out and routine breathing cycles at terminal facilities.
  • Chemical Storage: FEP diaphragm and selectable body materials suit atmospheric chemical tanks where vacuum protection must match vapor chemistry and operating temperature window.
  • Tank Farms: Standard ANSI and EN flange interfaces integrate with tank-farm piping on petroleum and chemical inventory vessels, streamlining specification across multi-vessel installations.
  • Liquid Withdrawal Systems: Controlled air admission prevents vacuum-induced structural damage during rapid product withdrawal on atmospheric storage supporting transfer, loading, or process feed operations.
  • Thermal Contraction Service: Admits air during overnight cooling and rapid ambient temperature drops, preventing structural damage on atmospheric tanks exposed to wide thermal swings and cold-weather events.
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Specifications

Parameter

Specification

Device Type

Weight-loaded vacuum vent

Standard Set Vacuum

0.5 oz/in²

Adjustable Range

Maximum setting is size-dependent; consult factory for specific setpoints

Sealing Method

Air-cushion-seated diaphragm

Loading Method

Weight-loaded

Nominal Sizes

2″, 3″, 4″, 6″, 8″, 10″, 12″

Flanged Connections

ANSI 125 FF / 150 RF; EN1092-1 PN16 FF/RF (RF not available in Aluminum); 2″ and 3″ available screwed or flanged

Temperature Range (Aluminum)

−65°F (−54°C) to +250°F (+121°C)

Temperature Range (316 SS)

−65°F (−54°C) to +350°F (+177°C)

Temperature Range (Carbon Steel)

−20°F (−29°C) to +350°F (+177°C)

Body and Seat

Aluminum, Carbon Steel, or 316 Stainless Steel

Pallets

Aluminum or 316 Stainless Steel

Diaphragm

FEP (standard); FKM, NBR, PFA available

Screen

Galvanized Steel (normal); Stainless Steel (severe service)

Weights

Lead (standard); Stainless Steel available

Hardware

316 Stainless Steel

Sizing Basis

Shand & Jurs WinSize (EZ-Flow)

Options

Steam jacket; HEPA inlet filter; alternate diaphragm materials (FKM/NBR/PFA); limit switches; raised-face flange (CS and SS bodies only); threaded connection (2″ and 3″)

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Contact Support

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

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How is vacuum setting selected?

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Standard setting is 0.5 oz/in². Higher settings are available depending on size and pallet configuration. Maximum setting is size-dependent, so the factory should be consulted for specific setpoints at the boundaries of the range.

Can the 94110 handle combined pressure and vacuum protection?

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The 94110 is a vacuum-only device. For combined pressure and vacuum protection from a single nozzle, Shand & Jurs recommends pairing the 94110 with a 94640 Pressure Pilot-Operated Valve or specifying a combined P/V conservation vent such as the 9402X Series.

What body materials are available?

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Aluminum, carbon steel, and 316 stainless steel bodies are available. Material selection matches vapor chemistry and operating temperature. Aluminum is standard for light-duty service; carbon steel and stainless cover the −350°F upper temperature range.

What is the operating temperature range?

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Temperature range depends on body material. Aluminum is rated −65°F to +250°F. 316 stainless steel is rated −65°F to +350°F. Carbon steel is rated −20°F to +350°F. Select the body material that matches service conditions at the nozzle.

What flange options are available?

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ANSI Class 125 FF and 150 RF are standard, plus EN1092-1 PN16 FF/RF for international projects. Raised-face flange is available on carbon steel and 316 stainless steel bodies only (not on aluminum). 2″ and 3″ sizes support both flanged and threaded (screwed) connections.

How is relief capacity sized?

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Capacity is sized using Shand & Jurs WinSize (EZ-Flow) based on anticipated vacuum flow rates and allowable pressure drops. Sizing documentation supports defensible vent selection aligned with the applicable code-of-construction and site safety program.

What options are available for demanding service?

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Available options include steam jacket (prevents product coagulation), HEPA inlet filter (atmospheric particulate protection), alternate diaphragm materials (FKM, NBR, or PFA), and limit switches for vent-opening remote indication.

Summary

With over a century of tank-safety heritage inside Cognesense, the Shand & Jurs 94110 Vacuum Vent is chosen for atmospheric storage tanks requiring vacuum protection during liquid withdrawal and thermal contraction. A weight-loaded pallet, air-cushion-seated FEP diaphragm, multi-material body construction, and global flange compatibility deliver predictable tank breathing and spec-ready integration into petroleum and chemical storage. For atmospheric vacuum protection, it is trusted wherever you need to measure, monitor, and protect what matters most.

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