Control valves

Self-acting controls

Kv values

Size

Kv

For conversion:

DN65 - 21⁄2"

65.0

Cv (UK) = Kv x 0.963

DN80 - 3"

94.0

Cv (US) = Kv x 1.156

Capacities/sizing chart

For saturated steam service see TI-GCM-08.

For water service see TI-GCM-09.

Dimensions / weights (approximate) in mm and kg

Size

DN65 - 21⁄2" 171

DN80 - 3"

194

B

B

203 190

236 216

BSP EN 1092

or

PN25

BST

NPT ASME150 F/H

Weight

C Screwed Flanged

150

8.1

17.2

160

13.6

22.7

A

A

C

C

B

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-S21-01) supplied with the product.

How to order

Example: 1 off Spirax Sarco 21⁄2" NS control valve with gunmetal

body and trim. Connections are to be screwed BSP.

Spare parts

The body gaskets (see Materials item 2) are available as spares in

packets of 6.

How to order spares

Example: 1 - Packet of body gaskets for a DN65 Spirax Sarco NS

control valve.

NS and NSRA Gunmetal Self-acting Control Valves

TI-P049-01 CH Issue 6

4.5.44