Overview: Siemens 245-00231
The Siemens 245-00231 is a factory-assembled 599 Series 3-way, 1/2 in. NPT zone valve (Cv 2.5, Kvs 2.15) with a Siemens SSE161.05U 24 VAC/DC 0 to 10 VDC modulating actuator. The fail-in-place actuator holds valve position on loss of power.
The 3-way body is a diverting valve: as the stem moves down, flow through the NO port (AB-A) decreases and flow through the NC port (AB-B) increases. It may also serve as a mixing valve in limited applications.
Specifications verified against Siemens 599 Series Submittal Sheet 154-034 (February 1, 2023); Valve Body Technical Instructions 155-320P25 (December 8, 2022); Assembly Selection Technical Bulletin 155-291 (February 3, 2023). Last reviewed October 11, 2026.
Best For
- Hot or chilled water zone control: zones with radiators, floor heating by manifolds, fan coil units, induction units, cooling ceilings, wall-mounted boilers, VAV applications
- 0 to 10 VDC modulating control
- Diverting service, and mixing service in limited applications
- Water and glycol solutions to 50%, 34 to 230 °F
Warranty
For Siemens warranty terms on this product, contact Team Zot at 855-825-2811 or sales@zotsupply.com.
Key Features
Factory Assembled
Valve body 599-00231 and the SSE161.05U actuator ship assembled under one product number.
Fail-in-Place
The actuator holds the last valve position on loss of power.
Tool-Free Mounting
Direct-coupled actuator hand-tightens onto the universal bonnet without tools, with manual override and visual position indication.
75 psi Close-Off
Maximum close-off pressure (AB-A) for this 1/2 in., Cv 2.5 body with the SSE161.05U.
ANSI Class IV Leakage
Seat leakage rate ANSI Class IV (AB-A) with the SSE161.05U.
Brass Body, Stainless Stem
Brass body and trim, Type 303 stainless steel stem, ethylene propylene O-ring packing.
ZOT Supply is an authorized distributor of Siemens products.
Technical Specifications
Valve Body
| Valve body part number | 599-00231 |
|---|---|
| Valve pattern | 3-way diverting (mixing in limited applications) |
| Action | Fail-in-place |
| Line size | 1/2 in. (15 mm) |
| End connection | NPT threaded |
| Flow coefficient (Cv) | 2.5 (AB to A) |
| Kvs | 2.15 |
| Flow characteristic | Linear |
| Body style | Globe |
| Seat style | Metal-to-metal |
| Bonnet | Direct-coupled, universal bonnet |
| Stem travel (stroke) | 1/10 in. (2.5 mm) |
| Valve body rating | ANSI Class 125 (PN 16) |
| Body / trim material | Brass / Brass |
| Stem material | Stainless steel ASTM A582 Type 303 |
| Packing | Ethylene propylene O-ring |
| Controlled medium | Water, glycol solutions to 50% |
| Medium temperature range | 34 to 230 °F (1 to 110 °C) |
| Maximum inlet pressure | 232 psig |
| Maximum close-off pressure (AB-A) | 75 psi with SSE161.05U |
| Close-off rating standard | According to ANSI/FCI 70-2 |
| Leakage rate | ANSI Class IV (AB-A) |
| Valve body weight | 0.90 lb (0.40 kg) |
| Service kit | 599-00599 AL50 zone valve support rings, 10 pack |
Actuator: SSE161.05U
| Actuator model | SSE161.05U |
|---|---|
| Control signal | 0 to 10 VDC Modulating |
| Operating voltage | 24 Vac ±15% or 24 Vdc ±20% |
| Power consumption | 3 VA (AC); 1.2 W (DC) |
| Frequency | 50/60 Hz |
| Power-failure action | Fail-in-place |
| Agency certification | UL as per UL60730-1, UL60730-2-14; cUL as per CSA CAN E60730-1, E730-2-14; FCC CFR 47 Part 15 Class B |
| Mounting location | NEMA 2/IP40 (interior only) |
| Actuator weight | 7.7 oz (0.22 kg) |
| Actuator dimensions | 3.7 H x 4.1 W x 1.9 D in. (92.6 x 104.4 x 49 mm) |
Assembly Dimensions and Service Envelope
| Valve centerline to top of actuator (H1) | 4.7 in. (118 mm) |
|---|---|
| Service height (H) | 12.7 in. (321 mm) |
| Valve centerline to actuator coupling (C) | 1.00 in. (25 mm) |
| Width or diameter of actuator (W1) | 4.1 in. (104.4 mm) |
| Service width (W) | 12.1 in. (307.4 mm) |
Valve Body Dimensions
| Overall length (A) | 2.76 in. (70 mm) |
|---|---|
| Overall height (B) | 2.34 in. (59.5 mm) |
| Pipe centerline to top of body (C) | 0.96 in. (24.5 mm) |
| Installation | Flow in direction of body arrow; actuator above valve body preferred; any position from vertical to horizontal, not below horizontal or upside down |
Documentation
Frequently Asked Questions
What is the Cv of the Siemens 245-00231?
The 245-00231 has a Cv of 2.5 (Kvs 2.15) on the AB to A path in a 1/2 in. NPT 3-way 599 body with a linear flow characteristic.
What does the Siemens 245-00231 do on power failure?
The SSE161.05U is a fail-in-place actuator, so the valve holds its last position on loss of power.
What power and control signal does the Siemens 245-00231 use?
The SSE161.05U runs on 24 Vac ±15% or 24 Vdc ±20%, 50/60 Hz, draws 3 VA (AC); 1.2 W (DC), and accepts a 0 to 10 VDC modulating control signal.
What is the close-off pressure of the Siemens 245-00231?
75 psi maximum close-off (AB-A), rated according to ANSI/FCI 70-2, with leakage rate ANSI Class IV (AB-A).
Can the Siemens 245-00231 be used as a mixing valve?
The 599 3-way body is a diverting valve. It may be used for mixing in limited applications: mounted in the return flow and within the allowable differential pressure for the system pressure shown in the 599 Technical Instructions.
How should the Siemens 245-00231 be installed?
Install so flow follows the arrow on the valve body. For best performance mount the actuator above the valve body; any position between vertical and horizontal is acceptable, but not below horizontal or upside down.
What media and temperatures is the Siemens 245-00231 rated for?
Water and glycol solutions to 50%, medium temperature 34 to 230 °F (1 to 110 °C), maximum inlet pressure 232 psig.
- Valve Pattern:
- 3-Way
- Valve Size:
- 1/2 Inch
- Connection Type:
- NPT
- CV Rating:
- 2.5
- Max Close-Off Pressure:
- 75 psi
- Medium Temperature Range:
- 34-230 °F
- Body Material:
- Brass
- Actuator Type:
- Non Fail-Safe
- Voltage:
- 24VAC/DC
- Control Signal:
- 0-10VDC
- Auxillary Switch:
- None
- Power Connection:
- Terminal Block
