Product Description
Siemens 259-02049 is a two-way globe valve assembly with a direct-coupled actuator that operates on 24 Vac and provides a 0.63 Cv flow coefficient. The normally open valve features stainless steel trim, female-to-female NPT connections, non-spring return (fail-in-place) actuator behavior and a close-off pressure of 120 psi. It supports floating three-position control and is rated for water, water-glycol (to 50%) and low-pressure steam below 15 psi within 5°C to 50°C.
- Direct-coupled electronic actuator (200 N force) operating at 24 Vac; power consumption 0.8 VA (three-position floating)
- Globe valve, two-way, 1/2 in. (0.5 in.) female x female NPT connection with 0.63 Cv and stainless steel trim
- Modified equal percentage flow characteristic, close-off pressure 120 psi; suitable for water, water-glycol up to 50% and low-pressure steam <15 psi
Product Highlights
Two-way normally open globe valve assembly, 0.63 Cv, 1/2 in. F x F NPT, stainless steel trim, 24 Vac direct-coupled actuator, fail-in-place, NEMA 1 enclosure
Product Information
Standard Information
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Brand: SIEMENS
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Manufacturer Part Number: 259-02049
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Country of Origin: United States
Technical Specifications
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Brand: Siemens
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Manufacturer Part Number: 259-02049
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Product Type: Two-way globe valve assembly
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Valve Type: Globe valve, two-way
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Size: 1/2 in. (0.5 in.)
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Connection: Female x Female NPT (F x F)
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Cv: 0.63
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Trim Material: Stainless steel
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Body Material: Brass
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Actuator Type: Direct-coupled electronic actuator
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Actuator Model: Powermite SSC81U
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Actuator Force: 200 N
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Return Type: Non-spring return (fail-in-place)
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Control Signal: Floating (three-position); two-position and 0-10 VDC proportional supported
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Input Voltage: 24 Vac (nominal)
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Power Consumption: 0.8 VA (three-position floating)
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Close-Off Pressure: 120 psi
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Flow Characteristic: Modified equal percentage
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Service Media: Water, water-glycol solutions to 50%, low-pressure steam <15 psi
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Operating Temperature: 5°C to 50°C (41°F to 122°F)
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Operating Humidity: 0 to 90% RH non-condensing
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Enclosure Rating: NEMA 1 (indoor)
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ANSI Leakage Class: Class IV (0.01% of Cv)
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Stroke Time (Two-position): 35 seconds
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Stroke Time (Three-position floating): 150 seconds
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Stroke Time (Proportional 0-10 VDC): 34 seconds
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Supply VA (Two-position): 9.8 VA
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Supply VA (Three-position floating): 0.8 VA
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Supply VA (Proportional 0-10 VDC): 2.5 VA
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Signal Input: Two-position, three-position (floating), 0-10 VDC proportional
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Electrical Connection: Plenum cable or 3/8-inch flex conduit
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Approvals: CE; EMC directive 89/336/EEC; 73/23/EEC low voltage; UL File E220114
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NEMA Rating: NEMA 1
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Net Weight: Approximately 2.2 lb
