How do I select the correct spring range for my application?

The BRV2S is supplied with one of three colour-coded springs based on required downstream pressure. Use Grey for 0.14–1.7 bar g, Green for 1.4–4.0 bar g, and Orange for 3.5–8.6 bar g. Where ranges overlap, always select the lower range for better control accuracy.

Can the BRV2S be used for gases other than steam and compressed air?

The valve is designed primarily for steam and compressed air. For other gases, contact Spirax Sarco or PC Engineering for application suitability and material compatibility.

What is the maximum allowable cold hydraulic test pressure?

The BRV2S is designed for a maximum cold hydraulic test pressure of 38 bar g. However, with internals fitted, test pressure must not exceed 19 bar g.

Is IBR certification available for this valve?

Certification requirements including IBR must be specified at the time of order. A manufacturer's Typical Test Report is available upon request.

What maintenance spares are recommended to keep in stock?

Key spares include the valve and seat assembly (parts 6, 11, 12, 19) and the gasket set (parts 6, 12). Contact PC Engineering for spare part kits.

SPIRAX SARCO · PRESSURE REDUCING VALVES

Spirax Sarco BRV2S SG Iron Pressure Reducing Valve – Direct Acting PRV for Steam & Compressed Air

Name: Spirax Sarco BRV2S SG Iron Pressure Reducing Valve – Direct Acting PRV for Steam & Compressed Air
Brand: Spirax Sarco

Spirax Sarco BRV2S direct acting pressure reducing valve in SG iron for steam & compressed air. DN15-DN25, up to 19 bar g. Get quote from PC Engineering.

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Overview

The Spirax Sarco BRV2S is a direct acting pressure reducing valve designed for precise downstream pressure control in steam and compressed air systems. Built with a robust SG iron body and stainless steel bellows, this valve delivers reliable pressure regulation in industrial process applications.

The BRV2S operates on a self-acting principle, requiring no external power source. It features a colour-coded spring system allowing operators to select the appropriate downstream pressure range: Grey (0.14–1.7 bar g), Green (1.4–4.0 bar g), or Orange (3.5–8.6 bar g). This modular spring design enables flexibility across different process requirements without changing the entire valve.

Suitable for saturated steam service up to 19 bar g at 210°C, the BRV2S is ideal for plant engineers seeking a compact, maintainable pressure reducing solution with screwed connections for easy installation in smaller pipelines.

Key Features

Direct acting design — no external power required
SG iron body (DIN 1693 GGG 40.3) with stainless steel bellows for durability
Three interchangeable colour-coded springs for downstream pressure ranges from 0.14 to 8.6 bar g
Screwed BSP or NPT connections for easy installation
Built-in strainer screen (SS 316) protects internals from debris
Maximum turndown ratio of 10:1 at maximum flow
Tamper-proof adjustment pin for secured set-point control
Manufacturer's Typical Test Report available on request

Specifications

Parameter	Value
Body Material	SG Iron DIN 1693 GGG 40.3
Bellows Material	Stainless Steel 316Ti/316L
Valve & Seat Material	Stainless Steel AISI 420 / BS 970 431 S29
Sizes Available	DN15 (½"), DN20 (¾"), DN25 (1")
Connection Type	Screwed BSP (BS 21 Rp) or NPT
Body Design Conditions	PN25
Max. Design Pressure	25 bar g @ 210°C
Max. Operating Pressure (Steam)	19 bar g @ 210°C
Max. Operating Temperature	210°C @ 19 bar g
Min. Operating Temperature	0°C (–10°C design minimum)
Max. Downstream Pressure	8.6 bar g
Max. Differential Pressure	19 bar
Kvs Values	DN15: 1.5 / DN20: 2.5 / DN25: 3.0
Weight	DN15: 1.60 kg / DN20: 1.70 kg / DN25: 1.95 kg

Applications

The Spirax Sarco BRV2S pressure reducing valve is suited for a wide range of industrial applications including:

- Steam pressure reduction for process heating, sterilizers, and jacketed vessels - Compressed air systems requiring stable downstream pressure - Small-to-medium capacity steam mains in pharmaceutical, food processing, and textile plants - HVAC and humidification systems - Auxiliary steam supplies in power and utilities

Frequently Asked Questions

Get a Quote

Contact PC Engineering for pricing, availability, and technical support for the Spirax Sarco BRV2S Pressure Reducing Valve. Call us or fill in our inquiry form — our engineers will respond within 24 hours.

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