Removable insulation blanket

custom-madefor valvessilica

Overview
BSTFLEX manufactures removable insulation jackets for direct-acting and pilot-operated pressure reducing valves used in steam, hot water, thermal oil and industrial process systems. Each cover is patterned around the valve body, bonnet, flanges, pilot components, gauges and sensing lines while preserving the access required for adjustment, inspection and maintenance. Materials, thickness, panel divisions and closures are selected for the actual valve and operating environment.

Product details
A pressure reducing valve has a complex shape: the valve body, bonnet, adjustment assembly, upstream and downstream flanges, pilot components, gauges and small-bore tubing affect the insulation pattern. BSTFLEX manufactures removable jackets to the actual valve model, drawing or field dimensions. Jackets follow hot valve surfaces and are divided where technicians need access. They can be removed for servicing and reinstalled without rebuilding adjacent pipe insulation.

Product Configuration (table)
Valve area | Typical jacket arrangement | Information required
Main valve body | Fitted body section with controlled overlaps | Body dimensions, valve size, orientation and surface temperature
Bonnet and adjustment assembly | Shaped upper panel, access opening or separate removable section | Bonnet height, diameter, adjustment method and service clearance
Inlet and outlet flanges | Integrated ends or independent flange jackets | Flange outside diameter, thickness, bolt projection and pipe insulation
Pilot, gauges and tubing | Reinforced cutouts, access flap or independently covered component | Locations, projections, tubing route and parts that must remain visible
Drain and low-point connections | Open clearance or separately removable lower panel | Connection size, valve or trap arrangement and drainage path

Designed specifically for pressure reducing valves
A general-purpose valve blanket may fit the body but fail around features that make a PRV adjustable and serviceable. Covers must account for operating orientation, bonnet, spring housing, adjustment screw, pilot, diaphragm chamber, sensing connection and nearby instruments. The insulation jacket is an external thermal component and does not regulate pressure or replace valve maintenance items.

Direct-Acting PRV Insulation Jackets
Direct-acting PRVs usually combine the main body, spring housing or diaphragm section and an accessible adjustment point. The jacket can use a fitted body section with a shaped bonnet cover; the upper section can be removable or have an exposed adjustment area when adjustment is frequent.

Pilot-Operated PRV Insulation Jackets
Pilot-operated PRVs include an external pilot valve, diaphragm chamber, control tubing, connectors and sensing lines. Sectional jackets are practical: separate overlapping panels for the main body, bonnet and pilot assembly with reinforced cutouts and closures placed to allow opening without disconnecting pilot tubing.

Valve Body and Bonnet Coverage
Fitted covers follow body profiles and transition to inlet/outlet connections. Shaped seams and darts reduce gaps. Bonnet may be included or covered independently to permit bonnet removal while leaving lower body insulated.

Adjustment Points and Operating Access
Pressure adjustment must remain available per manufacturer and plant procedures. Options include an exposed adjustment area, labeled access flap or separate upper cover. Insulation must not impede moving stems, indicator scales, vents or maintenance access.

Pilot Lines, Sensing Tubes and Capillaries
Small-bore tubing must not be loaded by the jacket. The cover can include reinforced openings or leave the pilot assembly outside the main section. Do not compress sensing lines between overlapping edges; unions, filters and test connections must remain accessible.

Pressure Gauges and Instrument Visibility
Gauges, transmitters and switches may require visibility and calibration access. Jackets can terminate below instrument connections or use reinforced cutouts to avoid contact with stems and calibration points.

Flanges, Unions and Adjacent Pipe Insulation
Jackets may stop at the valve body, include flanges or overlap adjacent pipe insulation. Provide flange outside diameter, face-to-face distance, bolt projection and adjacent insulation thickness to avoid compressing existing insulation and to permit practical tool access.

Pressure Reducing Station Insulation
A complete reducing station (isolation valve, strainer, separator, drain/trap, PRV, safety valve and gauges) is best insulated with labeled, individually removable covers for each serviceable component rather than one large blanket.

Drainage, Condensate and Leak Inspection
Drip pockets, drains, strainers and trap connections should remain visible or have dedicated access. Jackets must not trap leaking condensate; wet/contaminated insulation should be removed, inspected and dried or replaced before reinstallation.

Materials and Layer Construction
Removable PRV jackets combine an inner liner, insulation core, outer fabric and fastening system. Selection depends on temperature, location, contamination, weather and removal frequency.

• Inner Liner: Coated fiberglass, high-temperature fiberglass, silica fabric or other suitable textiles depending on service temperature and abrasion exposure.
• Insulation Core: Fiberglass, silica, mineral wool, ceramic-fiber or other insulation chosen for thermal requirement, space and handling.
• Outer Fabric: Protects insulation during operation, removal and storage; coated fiberglass commonly used. Outdoor or washdown locations require environment-specific fabric selection.
• Fastening System: Straps, buckles, hook-and-loop, D-rings, springs, wire lacing or combined systems selected per temperature at location, vibration and service needs.

Temperature and Thermal Performance
Supply normal operating and maximum design temperatures for valve surface. Provide ambient conditions, wind, insulation thickness limit and heat-loss targets if applicable. Fabric temperature ratings alone do not determine final outer-surface touch temperature; evaluate complete layer construction for stated conditions.

Indoor and Outdoor Service
Indoor jackets may face dust, oil mist or chemicals; outdoor installations add sunlight, rain and wind. Identify whether valves are sheltered, fully exposed or subject to washdown to choose appropriate outer fabrics, seams and fasteners. Removable fabric jackets are not pressure-tight enclosures or substitutes for metal weather protection.

Measurements Required for Manufacturing
Provide accurate installed dimensions or manufacturer drawings. Key items include:

• Valve manufacturer, model, nominal size and pressure class
• Body width, height, face-to-face length and installed orientation
• Bonnet, spring housing, diaphragm chamber and adjustment dimensions
• Inlet and outlet connection or flange dimensions
• Pilot valve, control line, sensing tube and filter locations
• Pressure gauges, transmitters, vents, drains and nameplates
• Adjacent pipe insulation diameter and thickness
• Nearby supports, walls and installation clearances
• Normal operating and maximum design temperatures
• Indoor or outdoor exposure and possible oil or chemical contact
• Parts that must remain visible, movable or immediately accessible

Panel Division and Identification
Panel divisions are chosen for maintenance tasks and safe handling weight. Labels identify equipment number, flow direction, upstream/downstream, and installation order to help technicians return all sections correctly.

Installation and Removal

• Confirm the valve is safe to approach under site operating and isolation procedures.
• Match each jacket section to the valve tag and installation orientation.
• Position the main body panel without pulling against pilot or sensing tubing.
• Fit bonnet, pilot and flange sections in the labeled order.
• Close fasteners evenly without covering gauges, vents, drains or adjustment points.
• Check that controls, instruments and service clearances remain unobstructed.
• For removal, open closures and separate panels instead of dragging the jacket over tubing or instruments. Store removed sections in a clean, dry place and inspect fabrics, stitching, insulation and hardware before reinstallation.

Safety and Application Boundaries
The jacket provides removable thermal insulation only. It does not contain pressure, stop leaks, replace safety guards, silence valve noise or correct valve malfunction. It must not block vents, drains, relief paths, moving stems, actuators or control connections. Insulation arrangements around pressure-control stations must be reviewed per valve manufacturer instructions and site procedures.

Custom Manufacturing and OEM Supply
BSTFLEX supplies one-off jackets, project quantities and repeat OEM production from drawings, field measurements or samples. Options include equipment labels, stainless-steel tags, panel numbering, color identification, installation sketches and private-label packaging. Maintain control of valve model, installed accessory layout and jacket revision for repeat orders.

RFQ Checklist

• Quantity and equipment tag
• Valve manufacturer, model, size and pressure class
• Direct-acting or pilot-operated construction
• Drawing, dimensioned sketch, photographs or sample
• Operating medium and temperature range
• Pilot, tubing, gauge, transmitter, vent and drain arrangement
• Adjustment points and parts that must remain uncovered
• Indoor or outdoor environment
• Required insulation thickness or thermal target
• Preferred closures, labels and panel divisions
• Destination and required delivery date

Related products and usage notes
Use separate, serviceable covers for other PRV station components (valve jackets, flange covers, pipe jackets, steam trap jackets) so each component can be serviced independently.

Caractéristiques / spécifications techniques

• Product name: Removable Pressure Reducing Valve Insulation Jacket
• Manufacturer: BSTFLEX
• Typical MOQ: 1
• Materials: inner liner (coated fiberglass/high-temp textiles), insulation core (fiberglass, silica, mineral wool, ceramic-fiber options), outer fabric (coated fiberglass or environment-specific fabrics)
• Fastening options: straps, buckles, hook-and-loop, D-rings, springs, wire lacing
• Application: direct-acting and pilot-operated PRVs for steam, hot water, thermal oil and industrial process systems
• Features: fitted panels, reinforced cutouts, removable sections, labeled panels for installation order, gauge and adjustment access
• Service conditions: indoor/outdoor selectable materials and construction based on operating and maximum design temperatures
• Measurement requirements: full valve and accessory dimensions, pilot/tubing/gauge locations, adjacent insulation thickness and orientation