Pressure Relief Valve Brass
Technical Specification
- Valve type: Adjustable pressure relief valve
- Material: Brass body and internal components
- Connection type: BSP parallel threads (ISO 228/1)
- Supplied with: ABS / Brass composite unions (unassembled)
- Nominal sizes: ½" to 3"
- Pressure adjustment range: 0.5 to 10 bar
- Maximum pressure: 16 bar
- Working temperature: 0°C to +70°C (valve assembly); brass valve rated up to +150°C
- Media: Gas, steam and liquids
- Seals: EPDM
- Compliance: PED 97/23/EC
- Function: Pressure relief / bypass valve
- Note: Not suitable for use as a safety valve
Description
This Pressure Relief Valve Brass is a robust, adjustable valve assembly designed to regulate and relieve excess pressure within ABS pipework systems. Supplied complete with two ABS composite union connections, this valve allows straightforward integration into nominal bore ABS installations while retaining the strength and reliability of a brass relief mechanism.
Designed for use with gases, steam and liquids, the valve features an adjustable pressure setting between 0.5 and 10 bar, enabling precise control of system pressure. The valve body and internal components are manufactured from brass, providing excellent durability and resistance to wear in demanding industrial environments.
The composite ABS unions are supplied unassembled to allow flexible installation. PTFE tape should be used when fitting the unions to the valve body, while the plain ABS ends should be solvent welded using ABS solvent cement and cleaner to ensure a secure, pressure-tight connection.
This valve is intended for pressure regulation and bypass applications only and should not be used as a safety valve.
Key Features & Benefits
- Adjustable pressure control: Settable from 0.5 to 10 bar for accurate system regulation
- Brass construction: Durable valve body suitable for gas, steam and liquid media
- ABS composite unions supplied: Enables direct connection to ABS pipe systems
- BSP parallel threads: Manufactured to ISO 228/1 standards
- Manual test function: Allows functional checks during commissioning and maintenance
- PED compliant: Designed in accordance with Pressure Equipment Directive 97/23/EC
- Bypass capability: Suitable for controlled pressure relief and bypass duties

| Number | Part Name | Material |
| 1 | Nut and Locknut | Brass |
| 2 | Housing Cap | Brass |
| 3 | Regulator | Brass |
| 4 | Locknut Regulator | Brass |
| 5 | Regulator Seat | Brass |
| 6 | Spring Pusher | Brass |
| 7 | Bonnet | Brass |
| 8 | Spring | Steel |
| 9 | Gasket | Pressed Fibre |
| 10 | O-Ring | EPDM Rubber |
| 11 | Rod | Brass |
| 12 | Valve Seat | Brass |
| 13 | Valve Gasket | EPDM Rubber |
| 14 | Valve Nut | Brass |
| 15 | Body | Brass |
