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Data sheet RAVK

Thermostatic Operator

VD52B222 © Danfoss 05/09 1

RAVK is a non-electric operator used with a

water valve to control temperature in under-

ﬂoor hydronic heating systems, small hot water

heating tanks or heat exchangers in radiator

heating systems.

RAVK will self regulate the set temperature

appropriately when mounted to 2-way low-Cv

valve VMT, or 3-way valve KOVM. RAVK is not

suitable for high-Cv VMT valves.

Applications:

Features:

Closes on rising sensor temperature

•

Temperature range is 77 – 149°F •

Mounts on either supply or return side of •

system

Sensor element can be ﬁtted in any •

orientation

Dial can be set to limit or lock the setting •

range

Heat exchanger in radiator heating system

RAVK – VMT, Hot water cylinder RAVK – VMT, Air heating coil

Summary of content (4 pages)

PAGE 1
Data sheet RAVK Thermostatic Operator RAVK is a non-electric operator used with a water valve to control temperature in underfloor hydronic heating systems, small hot water heating tanks or heat exchangers in radiator heating systems. Applications: RAVK will self regulate the set temperature appropriately when mounted to 2-way low-Cv valve VMT, or 3-way valve KOVM. RAVK is not suitable for high-Cv VMT valves.
PAGE 2
Data sheet RAVK Thermostatic Operator Applications (Cont.): RAVK – VMT 2-way valve, Floor heating system, RAVK KOVM RAVK – KOVM 3-way valve, Floor heating system Ordering Information: Element Code No. Type Setting Range Capillary length Max. Sensor temperature 013U8063 RAVK 77–149 °F (25-65 °C) 6.5’ (2.0 m) 248 °F (120 °C) Available valves for mounting on RAVK Code No.
PAGE 3
Data sheet RAVK Thermostatic Operator Mounting: The valve body must be piped with flow in the arrow direction. The sensor for the thermostatic element can be oriented in any of the following positions. + + + + Scale Setting: Relation between scale readings and closing temperature. Values are approximate. RAVK with VMT, KOVM Design: Scale Setting 1 2 3 4 5 77 - 149°F 77 95 113 131 149 °F 25 – 65°C 25 35 45 55 65 °C 1. Setting Knob 2. Setting Spring 3- Bellows 4. Gland 5.
PAGE 4
Data sheet RAVK Thermostatic Operator Dimensions: RAVK - VMT RAVK-VMT Valve Size L1 in (mm) L2 in (mm) H in (mm) ½” 2.60 (66) 3.54 (89.9) 4.06 (103) ¾” 2.91 (74) 3.98 (101) 4.06 (103) A in (mm) B in (mm) C in (mm) D in (mm) 3.15 (80) 0.37 (9.4) 2.39 (60.7) 3.53 (90) RAVK - KOVM Danfoss can accept no responsibility for possible errors in printed materials and reserves the right to alter its products without notice.