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Valve Insulation Jackets

Removable Valve Insulation Jackets

For indoor steam or hot-water valves that technicians need to operate and service. Start with the valve tag, a drawing or photos and a one-piece inquiry.

Valve Jackets
Design illustration

Compare designs, materials and expected results

Proposed design for quotation

Start with a removable body jacket, with a split or separate bonnet section if access calls for it. Keep the stem, handwheel or actuator travel clear.

Construction options
Compare coated glass-fibre facings and fibrous insulation for the actual service conditions. A nominal 25 mm core can be priced as a comparison option where thermal and clearance review supports it.
Dimensions to supply
Record valve type, connection size, installed body length, flange outside diameter and stem travel. Nominal valve size alone does not define the fit.
Acceptance checks
Agree a drawing revision, cover clearances, closure locations and a handwheel travel check. Confirm normal and peak equipment surface temperatures.

The material and thickness above are starting points for supplier review. The written quote specifies the agreed construction and operating limits. See the published hot-service specification example.

One-piece inquiries are welcome. The quotation confirms feasible quantity after design and supplier review. View quotation and dispatch terms →

Industrial valve with an exposed stem and bolted flanges
Equipment reference photo · Valve body, projecting stem and flange connections. Válvula industrial by Rjcastillo / Wikimedia Commons · CC BY-SA 3.0 · Resized and converted to WebP

What to measure before requesting a quote

Body and bonnet envelope, stem projection, and the actuator or handwheel travel.

Keep accessible · Controls, packing gland and identification plate.

TECHNICAL SELECTION

Decisions to make before specifying a cover

Confirm the equipment and operating requirements below before the supplier proposes the final construction and operating limits.

  • Equipment type, size and the datum used for each dimension
  • One unit system for the whole item schedule, and a revision identifier per drawing
  • Operating and maximum temperature recorded separately, with the working medium
  • Service access: handwheels, actuators, nameplates, inspection points and removal direction
  • Existing insulation, supports and adjacent equipment that limit the removable envelope
  • Any buyer-specified standard or documentation requirement, listed as a question rather than a claim
What we need

Information to prepare

  • Valve type, nominal size and end connection type
  • Dimensioned drawing or scaled photographs from at least two angles
  • Operating and maximum temperature, and the working medium
  • Handwheel, lever, actuator and positioner clearances
  • Indoor or outdoor location, and exposure to weather or washdown
  • Whether the valve must remain operable while covered
Measurement record

Points to record with units

  • Body length face-to-face and overall body height
  • Bonnet height and width, including packing gland
  • Stem projection and handwheel or actuator envelope
  • Flange outer diameter and bolt-circle clearance where relevant
  • Distance to adjacent pipework, supports, insulation and walls
  • Nameplate and inspection points that must stay visible or accessible
Structure questions

Design considerations

  • How the cover is split determines whether it can be removed without disturbing the stem or actuator.
  • Seam placement is a design question, not a validated construction standard.
  • Access panels are considered only where the buyer confirms a service need.

Specifications for a written quote

Valve envelope and travel

Face-to-face length, body width, bonnet height and the full handwheel or actuator travel.

Record normal and peak operating temperatures, their units, and the environment around the equipment.

Published industry reference

The data sheet lists standard and high-temperature variants for selected valve families. Check the exact model and variant.

Spirax Sarco lists maximum equipment surface temperatures of 240 °C for its standard variant and 425 °C for its high-temperature variant. These figures apply to the listed configurations.

The data sheet lists silicone-coated glass fibre fabric and mineral fibre insulation. Use these as comparison points when reviewing supplier material data.

Spirax Sarco insulation jacket data sheet, TI-P225-07

TERCC construction and ratings are confirmed for each proposed assembly in the written quotation.

See what a written quotation covers →

Compare cover designs

Two-Piece Gate Valve Jacket Concept
Design illustration
TERCC-RD-001

Two-Piece Gate Valve Jacket Concept

Two-piece

View details
Bonnet-Clearance Globe Valve Concept
Design illustration
TERCC-RD-002

Bonnet-Clearance Globe Valve Concept

Multi-panel

View details
Lever-Clearance Ball Valve Concept
Design illustration
TERCC-RD-003

Lever-Clearance Ball Valve Concept

Two-piece

View details
Control Valve with Service Panel Concept
Design illustration
TERCC-RD-004

Control Valve with Service Panel Concept

Multi-panel

View details

Have a drawing for this item?

Send it with a short description. Detailed technical fields can be completed later during the review.

Request a Quote →