SIEMENS VVF53./VXF53. series flange valves

SIEMENS VVF53./VXF53. series flange valves

Product Overview

Siemens VVF53. (two-way flange valve) and VXF53. (three-way flange valve) series, belonging to ACVATIX ™ The long stroke valve family is designed specifically for fluid control in industrial and building automation. Its core positioning is control or shut-off valves, compatible with PN 25 pressure rating, and can operate stably in the temperature range of -20... 220 ° C. It covers nominal diameters from DN15 to DN250, meeting different flow and diameter requirements.

Core technical parameters

1. Basic parameter table

Parameter categories, specific specifications, and key explanations

Rated pressure PN 25 (DN15... 50 compatible with PN16) DN65... 250 only compatible with PN25

Nominal diameter (DN) 15, 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250 DN15... 150 is ductile iron valve body, DN200... 250 is carbon steel valve body

Flow coefficient (kvs) 0.16... 630 m ³/h VVF53. K model (pressure compensation) kvs value optimization, adapted to higher pressure differentials

Normal temperature range for medium: -5... 220 ° C; low temperature: -20... 150 ° C (special sealing box needs to be replaced). The maximum temperature for steam medium is 220 ° C, and a low-temperature sealing box is required for antifreeze/saltwater

Rated travel DN ≤ 50:20mm; DN ≥ 65:40mm stroke length matched with actuator driving force (e.g. SAX. compatible with 20mm stroke)

Leakage rate straight through: DN15... 150 is 0... 0.01% kvs (Class IV), DN200... 250 is 0... 0.02% kvs; Bypass: 0.5... 2% KVS complies with EN 60534-4/EN 1349 standards

2. Pressure compensation characteristics (VVF53. K model)

Exclusive design: Using pressure compensation valve core, the same actuator can be used to control flow with greater pressure difference;

Suitable media: liquid and steam (DN65... 150 for closed flow direction, DN200... 250 for open flow direction);

Applicable actuators: Only compatible with electric hydraulic actuators (SKD../SKB../SKC..), not suitable for electric actuators (SAX..).

Executive matching scheme

Executive Parameters and Adaptation Table

Actuator series driving force stroke working voltage control signal operating time (on/off) adapted to valve scenarios

SAX. 800N 20mm AC/DC 24V, AC230V 3-digit, 0... 10V, 4... 20mA, etc. 120s (conventional), 30s (fast) DN ≤ 50 two-way/three-way valve, light load scenario

SKD. 1000N 20mm AC24V, AC230V 3-digit, 0... 10V, 4... 20mA, etc. Open for 30s/Close for 10-15 seconds DN ≤ 50 High load scenarios

SKB. 2800N 20mm AC24V, AC230V 3-position, 0... 10V, 4... 20mA, etc. Open for 120s/Close for 10s DN ≥ 65 two-way/three-way valve

SKC. 2800N 40mm AC24V, AC230V 3-position, 0... 10V, 4... 20mA, etc. Open for 120s/Close for 20s DN ≥ 65 large stroke valve

Media compatibility and application scenarios

1. Media adaptation table

Medium type, temperature range (° C), key requirements for valve series adaptation

Frozen water/cooling water 1... 25 VVF53., VXF53. Open systems require attention to impurity filtration

Low/high temperature hot water 1... 180 VVF53., VXF53. 130... 180 ° C is high temperature hot water, and the temperature resistance of the actuator needs to be confirmed

Antifreeze water/saltwater -20... 150 VVF53., VXF53. If the temperature is less than -5 ° C, a special sealing box (DN15... 50:428488060; DN65... 150:467956290) needs to be replaced

Saturated/superheated steam 100... 220 VVF53. (including K-type) VXF53. does not support steam, avoid wet steam (which can easily cause cavitation)

Hot oil 20... 220 VVF53., VXF53. Only suitable for mineral oil hot oil

2. Distribution of application scenarios

Application Fields VVF53. (Two way valve) VXF53. (Three way valve) Core Function

Boiler equipment ✅   ✅ Medium flow control, pressure regulation

Regional heating system ✅   ❌ Hot water delivery cut-off and flow regulation

refrigeration equipment ✅   ✅ Control of chilled water/saltwater circuit

cooling tower ✅   ✅ Cooling water circulation flow regulation (open system)

Heating unit/air conditioner ✅   ✅ Switching between hot and cold media, temperature control

Key points for installation and maintenance

1. Installation requirements

Location selection: Priority installation in the return pipeline (low temperature, low sealing load);

Pre installed accessories: A filter or dirt collector must be installed in front of the valve to prevent impurities from jamming the valve core;

Cavitation prevention: Limit the pressure difference before and after the valve according to the temperature pressure curve of the medium to avoid cavitation (special attention should be paid to steam medium);

Flange connection: Following ISO 7005 standard, pipeline flanges, bolts, and gaskets need to be provided on site.

2. Maintenance and Accessories

Routine maintenance: There is no special maintenance requirement for the valve. Before maintenance, the pump should be stopped, the power should be cut off, and the pressure should be released for cooling;

Low temperature accessories: If the medium temperature is less than 0 ° C, a valve stem heating element (ASZ6.6, material number S55845-Z108) needs to be installed;

Sealing letter replacement: When the temperature is below -5 ° C, a dedicated low-temperature sealing letter (DN15... 50:428488060; DN65... 150:467956290) needs to be replaced;

Replacement parts: VXF53. Replace VXF41. Series requires specialized matching parts (such as ALF41B15, compatible with DN15).

Compliance and Standards

Pressure Vessel Directive: Compliant with PED 2014/68/EU, DN65... 125 is classified as Class I (Module A), DN150... 250 is classified as Class II (Module A2);

Basic standards: comply with ISO 7005 (flange), EN 1092 (flange connection), VDI 2173 (valve characteristics), EN 60534-4 (leakage rate);

CE marking: DN65... 150 notified body number 0036, DN200... 250 notified body number 0035, compliance documents can be downloaded from Siemens official website.