Control valves

Control valves

Q series control valve selection guide:

Valve size

Valve series

Valve characteristic

Body material

Connections

3-port design

Stem sealing

Seating option

Other options

Flow coefficient

Connection type

Selection example:

How to order

DN15 and DN20 (mixing service only)

DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN120,

DN150 and DN200 (mixing and diverting service)

Q =

L =

3 =

4 =

6 =

7 =

3 =

D =

M =

Blank =

H =

B1 =

B2 =

Blank =

W =

G =

Blank =

X =

Q series 3-port

Linear

Cast iron

Carbon steel

Stainless steel

SG iron

Flanged

Diverting

Mixing

Standard PTFE chevron

Graphite packing

PN16 bellows seal

PN25 bellows seal

Standard metal-to-metal

Hard facing (stellite)

Soft seal (PTFE)

Standard

Extended bonnet

To be specified

To be specified

DN25 Q

L 4

3

M Kvs10

PN40

Example: 1 off Spirax Sarco DN25 QL43M Kvs10 flanged to PN40.

Q

L

4

TI-P359-14 CH Issue 4

QLM and QLD Three-port Control Valves

Page 7 of 8

DN25

3

M

Kvs10

PN40

4.1.76