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D&R High Quality DN25 Brass Safety Valve for Hot Water Boiler, 1 Inch Threaded/FM Psv Pressure Relief Valve

Customization: Available
Media: Water
Standard: G

Product Description

Basic Information Overview
Model NO.
BSVBJ303-DN25
Connection
Thread
Pressure
Adjustable (10~40bar)
Material
High Quality Brass
Applications
Boilers, HVAC, Water Pipelines
Working Medium
Air, Water, Steam, Gas
Brass Safety Valve
Product Description & Materials
Valve Construction

📋 Construction Parts:

  • 🔹 Cap / Adjust Screw / Nut: Brass
  • 🔹 Spindle / Valve Body: Brass
  • 🔹 Spring: Durable 55CrSi
  • 🔹 Disc / Valve Seat: Brass
Sealing Material Temp Range Features
FKM-30 ~ 180℃Oil, gas, chemical media
PTFE-60 ~ 170℃Strong chemical resistance
RPTFE-60 ~ 220℃High-temp stability
EPDM-40 ~ 110℃Hot water, HVAC systems
Working Principle

✅ System pressure acts on the disc from the inlet side.

✅ Pre-compressed spring keeps the disc tightly sealed under normal operation.

✅ When pressure reaches the set point, upward force overcomes spring force and the disc pops open instantly for rapid release.

✅ As pressure drops, the spring restores the disc for a leak-free seal.

Technical Specification
Inlet d (mm) Outlet Lift H (mm)
1/2"131/2"0.5157
3/4"193/4"0.7169.5
1"251"0.9200
1 1/2"381 1/2"1.4243.5
2"502"1.8281.5
Dimension Diagram
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Production & Facilities
Video Poster
Factory 1 Factory 2 Factory 3
Frequently Asked Questions
Q1. Are you factory or trader?
We have our own brass products factory and are able to supply brass valves, fittings, custom parts, and braided hoses with an average production capacity of 1.5 million pieces per month.
Q2. How do you ensure that your products are reliable?
We perform 100% pressure tests, appearance inspections, and material inspections. Reports and boxing photos/videos are provided before delivery. Third-party inspections are also welcome.
Q3. Do you have your own R&D team?
Yes, we can draw sketches according to customer requirements and manufacture hundreds of customized products every year.
Q4. Do you provide samples?
Yes, we are happy to provide samples, especially for your customized product requirements.
Q5. Can you accept customized set pressures?
Yes, we provide 100% pressure set-point calibration and can customize the pressure range (10-40 bar) to meet your specific needs.
Q6. What are the main applications for these valves?
They are ideal for hot water boilers, HVAC systems, and water/steam pipelines requiring over-pressure protection.

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