Manual TRV20

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® U.S. Registered Trademark EN0B-0617GE51 R1211

VSxF-2/-3/-4

SMALL LINEAR VALVES PN16

FOR MODULATING AND ON/OFF-CONTROL

PRODUCT DATA

VSxF-2

SxF-3

SxF-4

GENERAL

These small linear valves are used in combination with small

electric linear valve actuators and thermoelectric actuators for

the control of hot and/or chilled water for fan coil units and

small reheaters/recoolers in electric/electronic temperature

control systems.

FEATURES

 Small size allows installation where space is limited

 Long stroke results in a high quality characteristic

 Soft seat provides low leakage rate and high

rangeability

 High close-off pressure

 Wide standardized range of k

values

 Reduced k

values in the bypass to facilitate

hydronic balancing

 Dezincification-resistant yellow brass

 Range of fittings available for different connections

(soldered, threaded)

 Models with integrated snap-on linkage for MT-series

thermal actuators

 Standardized opening direction across the complete

VS portfolio (valve stem down to open A-B / A-AB)

 Valve diverting usage capability (depending on

model)

SPECIFICATIONS

Models Two-way VSxF-2

Three-way VSxF-3

Three-way with bypass VSxF-4

Operation Two-way; three-way stem up to

close, port A to B / AB

Nominal pressure rating PN16

Capacity index (k

) see tables on pages 2, 3, and 4

Close-off pressures see tables on pages 2, 3, and 4

Leakage rate 0.02% of k

Port connection flat sealing connections in

standard sizes

Valve body

Material Brass

Size DN15 (1/2“), DN20 (3/4“),

DN25 (1-1/4”)

Trim

Stem Stainless steel

Plug Brass

Suitable medium Water, with max. 50% glycol

Controlled water temp. 2...120 C

Modulating valves

VSMF-xxx

Stroke 6.5 mm

Dimensions see Fig. 4, Fig. 5, and Fig. 6 on

page 6

Characteristic 2-way: modified equal %

3-way: A-AB modified equal %;

B-AB linear

ON/OFF valves

VSOF-xxx

Stroke 2.5 mm

Dimensions see Fig. 4, Fig. 5, and Fig. 6 on

page 6

Summary of content (8 pages)

PAGE 1
VSxF-2/-3/-4 SMALL LINEAR VALVES PN16 FOR MODULATING AND ON/OFF-CONTROL PRODUCT DATA SPECIFICATIONS Models Operation Nominal pressure rating Capacity index (kVS) Close-off pressures Leakage rate Port connection VSxF-2 VSxF-3 VSxF-4 GENERAL These small linear valves are used in combination with small electric linear valve actuators and thermoelectric actuators for the control of hot and/or chilled water for fan coil units and small reheaters/recoolers in electric/electronic temperature control systems
PAGE 2
VSXF-2/-3/-4 – PRODUCT DATA NAMING KEY TYPE 2 = 2-WAY 3 = 3-WAY 4 = 3-WAY BYPASS CHARACTERISTIC STROKE M = MODULATING (6.5 mm) O = ON/OFF (2.5 mm) V S M F 2 15 VALVE SIZE S = SMALL CONNECTION TYPE F = FLAT C = CONICAL SIZE 15 = DN15 20 = DN20 25 = DN25 kVS 3 1.6 = 1.6 m/h 3 2.5 = 2.5 m/h ... 1.
PAGE 3
VSXF-2/-3/-4 – PRODUCT DATA VSxF-3 Three-Way Valves with Flat Sealing kvs DN A-AB B-AB type snap-on stroke feature* 15 0.25 0.16 MOD -15 0.40 0.25 MOD -15 0.63 0.40 MOD -15 1.0 0.63 MOD -15 1.6 1.0 MOD -15 2.5 1.6 MOD -20 2.5 1.6 MOD -20 2.5 1.6 MOD -20 4.0 2.5 MOD -20 4.0 2.5 MOD -25 6.3 4.0 MOD -25 8.0 5.5 MOD -15 1.0 0.63 ON-OFF -15 1.0 0.63 ON-OFF • 15 1.6 1.0 ON-OFF -15 1.6 1.0 ON-OFF • 15 2.5 1.6 ON-OFF -15 2.5 1.6 ON-OFF • 20 2.5 1.6 ON-OFF -20 2.5 1.6 ON-OFF • 20 4.0 2.5 ON-OFF -20 4.0 2.
PAGE 4
VSXF-2/-3/-4 – PRODUCT DATA VSxF-4 Four-Way Valves with Flat Sealing kvs DN A-AB B-AB type snap-on stroke feature* 15 0.25 0.16 MOD -15 0.40 0.25 MOD -15 0.63 0.40 MOD -15 1.0 0.63 MOD -15 1.6 1.0 MOD -15 2.5 1.6 MOD -20 2.5 1.6 MOD -20 2.5 1.6 MOD -20 4.0 2.5 MOD -20 4.0 2.5 MOD -25 6.3 4.0 MOD -25 8.0 5.5 MOD -15 1.0 0.63 ON-OFF -15 1.0 0.63 ON-OFF • 15 1.6 1.0 ON-OFF -15 1.6 1.0 ON-OFF • 15 2.5 1.6 ON-OFF -15 2.5 1.6 ON-OFF • 20 2.5 1.6 ON-OFF -20 2.5 1.6 ON-OFF • 20 4.0 2.5 ON-OFF -20 4.0 2.
PAGE 5
VSXF-2/-3/-4 – PRODUCT DATA OPERATION inlet In the case of the two-way valve, the three-way valve, and the three-way valve with bypass, the built-in spring produces a closing force on the A-B / A-AB ports. The valves are supplied with a screwed-on adjustment cap for manual operation and for protection of the stem. If it should become necessary to flush the system, the valve can be opened between approx.
PAGE 6
VSXF-2/-3/-4 – PRODUCT DATA ACCESSORIES Valves VSxF-2 need two connection sets, valves VSxF-3 need three connection sets, and valves VSxF-4 need four connection sets.
PAGE 7
VSXF-2/-3/-4 – PRODUCT DATA 6.5 mm STROKE* M30x1.5 18 d b ALLOW 130 mm (DN15/20) OR 150 mm (DN25) FOR ACTUATOR AND CLEARANCE FOR REMOVAL. b c b b a Fig. 6. Three-way valves with bypass, dimensions *NOTE: In the case of modulating valves, the stroke amounts to 6.5 mm, and the closure distance to 18 mm. In the case of ON/OFF valves, the stroke amounts to 2.5 mm, and the closure distance to 14 mm. Table 3.
PAGE 8
VSXF-2/-3/-4 – PRODUCT DATA VALVE ACTION WITH MT-SERIES SMART-T THERMAL ACTUATORS NC version NC NO version NO A NC AB A A AB AB B AB B AB A B A NO A AB B Fig. 7. Valve action with MT-series Smart-T Thermal Actuators Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A.