Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

Siemens MVL661.25-6.3 Pressure-Actuated Water Regulating Valve - Pressure-Actuated Water Regulating Valves
SiemensPressure-Actuated Water Regulating Valves

Siemens MVL661.25-6.3 Pressure-Actuated Water Regulating Valve

The SIEMENS Pressure Regulating Valve: Two-Way (MPN MVL661.25-6.3) is a pressure-actuated water regulating valve with a steel body, designed for use with R-507 refrigerant. It features a maximum flow capacity of 27.7…

SKU 3G-OTH-72557

Also listed as: MVL6612563 · MVL661 25 6 3 · MVL661-25-6-3

Brand
Siemens
Item
MVL661.25-6.3 Pressure-Actuated Water Regulating Valve
Category
Pressure-Actuated Water Regulating Valves
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
MVL661.25-6.3
Type
1 in
Max.
27.7 gpm
Body Material
Steel
For Refrigerant Type
R-507
Sweat Pipe Connection
1 1/8 in

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Pressure Regulating Valve: Two-Way (MPN MVL661.25-6.3) is a pressure-actuated water regulating valve with a steel body, designed for use with R-507 refrigerant. It features a maximum flow capacity of 27.7 gpm and connects via a 1 1/8 in sweat pipe connection.

Frequently Asked Questions

What is the SIEMENS MVL661.25-6.3 pressure regulating valve used for?

The SIEMENS MVL661.25-6.3 is a two-way pressure-actuated water regulating valve used in refrigeration systems with R-507 refrigerant. It modulates water flow to maintain stable condensing pressure, commonly applied in industrial chillers and process cooling loops.

What are the specifications of the SIEMENS MVL661.25-6.3 valve?

The SIEMENS MVL661.25-6.3 is a two-way pressure regulating valve with a steel body, rated for R-507 refrigerant. It has a maximum flow of 27.7 gpm and a 1 1/8 in sweat pipe connection. The manufacturer part number is MVL661.25-6.3.

Where to buy the SIEMENS MVL661.25-6.3 valve worldwide?

3G Electric supplies the SIEMENS MVL661.25-6.3 pressure regulating valve worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install the SIEMENS MVL661.25-6.3 pressure regulating valve?

Install the SIEMENS MVL661.25-6.3 in the water line with the arrow matching flow direction. Braze the 1 1/8 in sweat connections using dry nitrogen purge to prevent oxidation. Ensure the valve is accessible for adjustment and the refrigerant line is properly connected to the actuator.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens pressure-actuated water regulating valves. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Siemens
Siemens
Magnetic Valve: 9.4 Cv Flow Rate, 2-Way, 1 in Union NPT, Spring Return, NC, Floating Signal (MPN MXG461.25-8.0U)
Siemens
Siemens
Magnetic Valve: 14 Cv Flow Rate, 2-Way, 1 1/4 in Union NPT, Spring Return, NC, Floating Signal (MPN MXG461.32-12U)
Pneumatic Control Valve: 4 Cv Flow Rate, 3-Way, 1/2 in Female NPT, Spring Return, Spring Return (MPN 258-02069)
Siemens
Pneumatic Control Valve: 4 Cv Flow Rate, 3-Way, 1/2 in Female NPT, Spring Return, Spring Return (MPN 258-02069)
Hydronic Globe Valve: 3-Way, 400 CV Flow, 6 in Flanged, Aluminum Body, Normally Closed/Normally Open (MPN 294-06179)
Siemens
Hydronic Globe Valve: 3-Way, 400 CV Flow, 6 in Flanged, Aluminum Body, Normally Closed/Normally Open (MPN 294-06179)
Hydronic Globe Valve: 2-Way, 0.4 CV Flow, 1/2 in NPT, Brass Body, NC, Actuator Included (MPN 255-01100)
Siemens
Hydronic Globe Valve: 2-Way, 0.4 CV Flow, 1/2 in NPT, Brass Body, NC, Actuator Included (MPN 255-01100)
Siemens
Siemens
This Siemens 2-way flanged zone valve features a 1-1/2 in flanged port connection and a 24V AC/DC actuator. It is spring return, normally closed (NC), and accepts a proportional control signal for modulating flow. Suitable for regulating water or glycol in HVAC and fluid control systems

More from Siemens

View all Siemens parts
Siemens
Siemens
Pressure-actuated water regulating valve with steel body, designed for use with R-744 refrigerant. Modulates water flow to maintain condensing pressure in refrigeration systems. Maximum flow capacity 8 cu m/hr, connection size 3/4 in
Siemens
Siemens
This pressure-actuated water regulating valve from Siemens features a steel body and is designed for use with R-507 refrigerant. It modulates water flow in response to discharge pressure, helping to maintain stable system operation. Typical applications include refrigeration systems where precise pressure control is required
Siemens
Siemens
SIEMENS Hot Gas Bypass Valve: Pressure, 8 cu m/hr Max., 1 in (MPN M3FB25LX/A)