Danfoss VRB 2, VRB 3 Data sheet

Data sheet

Seated valves (PN 16)

VRG 2 – 2-way valve, external thread VRG 3 – 3-way valve, external thread

Description

VRG 3VRG 2

VRG valves provide a quality, cost effective solution for most water and chilled applications.

The valves are designed to be combined with following actuators:

• With AMV(E) 335, AMV(E) 435 or AMV(E) 438 SU actuators.

• With AMV(E) 25, 25 SU/SD, 35 actuators (with adapter 065Z0311).

Combinations of actuators is evident under section “Dimension”.

Features:

• Bubble tight design

• Snap mechanical connection together with AMV(E) 335, AMV(E) 435

• Dedicated 2-port valve

• Suitable for diverting applications (3-port)

Main data:

• DN 15-50

• kVS 0.63 -40 m3/h

• PN 16

• Temperature:

- Circulation water / glycolic water up to 50 %:

2 (–10*) … 130 °C

* At temperatures from 10 °C up to +2 °C use stem heater

• Connections:

- External thread

Ordering

Example: 3-way valve; DN 15; kVS 1.6 ; PN 16; T

130 °C; ext. thread

max

- 1× VRG 3 DN 15 valve Code No.: 0 65 Z011 3

Option:

- 3× Tailpieces Code No.: 06 5Z0291

2 & 3-way valves VRG (external thread)

Picture DN

20 6.3 065Z0136 06 5Z0116

25 10 065 Z0137 06 5Z0 117

32 16 06 5Z0138 0 65Z 0118

40 25 06 5Z0139 065Z0119

50 40 06 5Z0140 0 65Z0 120

kVS

(m3/h)

0.63 06 5Z0131 06 5Z0111

1.0 06 5Z0132 06 5Z0112

1.6 06 5Z0133 06 5Z0113

2.5 065Z 0134 065Z 0114

4.0 065Z 0135 065 Z011 5

VRG 2 VRG 3

Code No.

Data sheet Seated valves VRG 2, VRG 3

Ordering (continued)

Technical data

Accessories - Tailpieces

Typ e DN Code No.

Rp ½ 15 065Z0291

Rp ¾ 20 065Z0292

Rp 1 25 065Z0293

Tailpiece

1 tailpiece inter nal thread for VRG ext . thread (Ms - CuZn39Pb3)

Nominal diameter DN 15 20 25 32 40 50

kVS value m3/h 0.63 1.0 1.6 2.5 4.0 6.3 10 16 25 40

Stroke mm 10 15

Control range 30:1 50:1 100 :1

Control characteristic LOG: port A-AB; LIN: por t B-AB

Cavitation factor z ≥ 0.4

Leakage

Nominal pressure PN 16

Max. closing pressure bar

Medium Circulation water / glycolic water up to 50 %

Medium pH Min. 7, Max. 10

Medium temperature °C 2 (–10 1) ) … 130

Connections ext. thread

Materials

Valve body Grey cast iron EN-GJL-250 (GG-25)

Valve stem Stainless steel

Valve cone Brass

Stuffing box sealing EPDM

At temperature s from -10 up to +2 °C use stem heate r

Rp 1¼ 32 065Z0294

Rp 1½ 40 065Z0295

Rp 2 50 065Z0296

Accessories - Adapter & stem heater

Typ e for actuators Code No.

Adapter AMV(E) 25/35 065 Z0311

Stem heater AMV(E) 335/435 0 65Z0315

Service kits

Typ e DN Code No.

15 0 65Z0321

20 065Z0322

Stuffing box

A - AB bubble tight design

B - AB ≤ 1.0 % of kVS

Mixing: 4

Diverting: 1

25 065Z0323

32 065Z0324

40/50 065Z0325

Pressure temperature diagram

PN 16

EN -GJ L-25 0 (GG -25)

Maximum allowed operating pressure as a function of medium temperature.

Data sheet Seated valves VRG 2, VRG 3

Valve characteristics

Valve characteristics log (2-way) Valve characteristics log/lin (3-way)

Capacity

Installation Valve mounting

Before valve mounting the pipes have to be cleaned and free from abrasion. Valve must be mounted according to flow direction as indicated on valve body except by diverting, where valve can be mounted oposite to the flow direction (flow oposite to indication on the valve body). Mechanical loads of the valve body caused by the pipes are not allowed. Valve should be free of vibrations as well.

Stroke

A+BAB



Stroke

Capacity



Note: Install a strainer upstream of the valve (e.g. D anfoss FVR/ FVF)

Installation of the valve with the actuator is allowed in horizontal position or upwards. Installation downwards is not allowed.

Always install the valve with the arrow on the body in the same direction as the flow. In order to avoid turbulence, which will affect the measuring accuracy, it is recommended to have a straight length of pipe up and down stream from the valve as shown (D - diameter of pipe).

Mixing Diverting

Fig. 1: Mixing or diverting connection

Fig. 2: Mixing valve used in mixing application

FVR/FVF

AMV(E)

Fig. 3: Mixing valve used in diver ting application

Fig. 4: Diverting valve used in diverting application

Mixing or diverting connection

3-way valve can be used either as mixing or diverting valve (fig.1).

If 3-way valve is installed as mixing valve meaning that A and B ports are inlet ports, and AB port is outlet port it can be installed in mixing (fig.2) or diverting application (fig.3).

3-way valve can be also installed as diverting valve in diverting application (fig.4) meaning that AB port is inlet and A and B ports are outlets.

Note: Maximal closing pressure for mixing and diverting insta llation are no t the same. Plea se refer to value s stated in Technical data section.

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