Control valves

Control valves

Valve selection guide

Valve size

Valve type

Valve

characteristic

Body

material

Connections

Valve

plug seal

Actuator

type

Valve

position

Optional

1⁄2", 3⁄4", 1", 11⁄4", 11⁄2" and 2"

P = Piston valve

F = Fast opening

5 = Bronze

P

F

5

1 = Screwed

G = PTFE

1 = 45 mm diameter

2 = 63 mm diameter

3 = 90 mm diameter

NC = Normally Closed

NO = Normally Open

BD = Bi-Directional

BSP or NPT

1

G

(for valve sizes 1⁄2" to 1")

(for valve sizes 1⁄2" to 2")

(for valve sizes 1" to 2")

Provides indication of open or closed valve position through a magnetic reed switch

with volt free contacts.

Maximum rating: Voltage (V) = 500 V,

Current (I) = 0.5 A,

Power (P) = 30 VA.

Available on Type 2 and Type 3 actuators with suffix 'I' if this option is required.

Provides manual control of maximum flow through the valve.

Can also provide manual shut-off on normally open valves.

Available on Type 2 and Type 3 actuators with suffix 'R' if this option is required.

2

NC

Blank = No options required

I = Travel switch

R = Flow regulator

Note: Shaded areas represent fixed parameters

Valve selection guide example

-

-

Screwed BSP

How to order

Example: 1 off Spirax Sarco 1" PF51G-2NC bronze piston actuated on/off valve having screwed BSP connections.

Spare parts

A seal kit is available for all valve and actuator sizes comprising: Piston lip seal, stem 'O' ring, valve head seal (PTFE), body seal.

How to order spare seal kits

Always order spares by specifying the valve size, type and date code (given on the actuator label i.e. 120 = week 12, year 2000).

Example: 1 off Seal kit for a 1" PF51G-2NC, date code 120.

Safety information, installation and maintenance

For full details, see the Installation and Maintenance Instructions supplied with the product.

Installation note: These valves can be mounted in any orientation. The actuator can be rotated 360° in the direction indicated on the product

label to facilitate easy pilot mounting connection.

TI-P373-14 CH Issue 4

PF51G Bronze Piston Actuated On / Off Valves

Page 7 of 8

1"

1"

PF5

1

G

2

NC

4.1.102