🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN 1491:2022

BS EN 1491:2022

$142.49

Building valves. Expansion valves. Tests and requirements

Published By Publication Date Number of Pages
BSI 2022 28
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Categories: ,

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This document specifies dimensions, materials and performance requirements (including methods of test) for expansion valves, of nominal sizes from DN 15 to DN 32, having working pressures ) from 0,1 MPa (l bar) to 1,0 MPa (10 bar). Expansion valves are intended for fitting to the cold potable water supply of storage water heaters, having a maximum distribution temperature of 95 °C, for all energy sources. Expansion valves do not control the temperature and alone do not constitute the protection required for storage water heaters. Expansion valves limit pressure, in the water heaters to what they are fitted, that is produced by thermal expansion of the water. NOTE The use of the device specified in this document does not override the need to use controls (e.g. thermostats and cut-outs) which act directly on the power sources of water heaters (for more information see Annex A).

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
10 4 Materials and surface finishes
4.1 General
11 4.2 Materials
4.3 Detection of residual stress
4.3.1 General
4.3.2 Test
4.3.3 Test method (Procedure)
12 4.3.4 Requirements
4.4 Corrosion resistance test
4.4.1 General
4.4.2 Test method
4.4.3 Requirements
4.5 Coating adherence test
4.5.1 General
4.5.2 Test method
13 4.5.3 Requirements
4.6 Compatibility with the products used for shock disinfection of the networks
4.6.1 General
4.6.2 Test method
4.6.3 Requirements
14 5 Design, dimensional and pressure requirements
5.1 General guidance
5.2 Dimensional characteristics
5.2.1 Nominal outlet diameter
5.2.2 End connections
5.3 Expansion valve outlet connection to air break to drain
5.4 Expansion valve discharge connection to drain service
5.5 Connections
15 5.6 Pressures
5.6.1 General
5.6.2 Nominal set pressure (Pnr)
5.6.3 Water tightness pressure (Pe)
5.6.4 Opening pressure (Po)
5.6.5 Rating pressure (Pdn)
5.6.6 Clossing pressure (Pf)
5.6.7 Initial opening pressure (Pdc)
6 Apparatus
6.1 General
16 6.2 Tolerances of parameters and accuracy of measure instruments
6.2.1 Tolerances on set parameters
6.2.2 Accuracy of measuring instruments
6.2.3 Test media
7 Hydraulic tests and requirements
7.1 Cold water pressure tests
7.1.1 General
7.1.2 Water tightness pressure (Pe) test
17 7.1.3 Repeat tests
7.2 Endurance test
7.2.1 Procedure
18 7.2.2 Requirement
7.3 Easing gear (manual control device)
7.3.1 Operation of the easing gear
7.3.1.1 Procedure
7.3.1.2 Requirement
7.3.2 Easing gear endurance test
7.3.2.1 Procedure
7.3.2.2 Requirement
8 Mechanical tests and requirements
8.1 Mechanical strength
8.1.1 Pressure test of the body of the expansion valve
8.1.1.1 Procedure
8.1.1.2 Requirement
19 8.1.2 Bending moment test of the body of the expansion valve
8.1.2.1 General
8.1.2.2 Procedure
20 8.1.2.3 Requirement
8.2 Mechanical strength of the easing gear
8.2.1 Procedure
8.2.2 Requirement
8.3 Torsional strength of the expansion valve’s body
8.3.1 General
8.3.2 Procedure
21 8.3.3 Requirement
8.4 Torque test of the captive rotating nuts/tail pieces
8.4.1 General
8.4.2 Procedure
8.4.3 Requirement
9 Classification
22 10 Designation
11 Marking
23 12 Technical documents and presentation at delivery
24 Annex A (informative)Classification of water heaters according to heating method
A.1 Indirect heating
A.2 Classification of water heaters according to heating method
A.2.1 Indirect heating
25 A.2.2 Direct heating

Related products

BS EN 1491:2022
$142.49