SUS304 Stainless Steel Vertical Spring Check Valve – 1.6 MPa
SUS304 stainless steel vertical spring check valve with Female × Female threaded ends for automatic reverse-flow prevention in compatible piping systems. Rated for 1.6 MPa working pressure and -30°C to 120°C operating temperature, with sizes from DN15 to DN50 for water and steam applications.
The SUS304 stainless steel vertical spring check valve
is designed to allow flow in one direction while helping prevent
reverse flow automatically.
The valve uses a spring-assisted internal closing mechanism
and Female × Female threaded ends in a compact inline body.
The current specification lists a working pressure of
1.6 MPa and a working-temperature range of
-30°C to 120°C.
Available sizes are DN15, DN20, DN25, DN32,
DN40 and DN50. Water and steam are listed
as working media.
Key Product Features
SUS304 Stainless Steel
The valve material is specified as SUS304 stainless steel.
Spring-Assisted Closing
Internal spring mechanism helps the valve close
automatically when reverse flow occurs.
Vertical Check Design
Compact inline configuration for compatible
piping and equipment installations.
1.6 MPa Working Pressure
Current technical data lists a working pressure of 1.6 MPa.
-30°C to 120°C
Listed working-temperature range for compatible applications.
DN15 to DN50
Six nominal sizes are available within the current series.
Technical Specifications
| Product Type | Vertical Spring Check Valve |
|---|---|
| Material | SUS304 Stainless Steel |
| Check Mechanism | Spring-Assisted |
| Connection | Female × Female Threaded Ends |
| Working Pressure | 1.6 MPa |
| Working Temperature | -30°C to 120°C |
| Working Media | Water / Steam |
| Available Sizes | DN15 / DN20 / DN25 / DN32 / DN40 / DN50 |
| Thread Standard | To be confirmed |
| Spring Material | To be confirmed |
| Sealing Material | To be confirmed |
| Cracking Pressure | To be confirmed |
Buyer Note:
thread standard, spring material, sealing material
and cracking pressure are not specified in the current
technical sheet and should be confirmed when required.
Available Sizes
| Nominal Size | Material | Working Pressure |
|---|---|---|
| DN15 | SUS304 | 1.6 MPa |
| DN20 | SUS304 | 1.6 MPa |
| DN25 | SUS304 | 1.6 MPa |
| DN32 | SUS304 | 1.6 MPa |
| DN40 | SUS304 | 1.6 MPa |
| DN50 | SUS304 | 1.6 MPa |
How a Spring Check Valve Works
Forward flow pushes the internal check element away from
the seat and allows fluid to pass through the valve.
When the flow decreases or reverses, the spring assists
the closing movement and returns the internal element
toward the seat.
Actual opening and closing characteristics depend on
spring force, valve size and system operating conditions.
If minimum cracking pressure is important,
confirm the required value before ordering.
Spring Check vs Swing Check Valve
A spring check valve uses a spring-assisted internal element,
while a swing check valve uses a hinged disc.
Spring-assisted designs generally close faster,
while actual pressure loss and flow performance depend
on the internal geometry of the specific valve.
Selection should consider flow rate, pressure drop,
installation conditions and required closing behavior.
Typical Applications
Water Systems
Automatic reverse-flow prevention in compatible water lines.
Steam Systems
Steam is listed as an applicable medium
within the specified operating range.
Equipment Connections
Compact inline configuration for compatible
equipment and piping connections.
Pipeline Protection
Helps prevent reverse flow toward compatible
upstream pipelines and equipment.
What Should Buyers Confirm Before Ordering?
- Required size: DN15, DN20, DN25, DN32, DN40 or DN50
- Female × Female connection requirement
- Required thread standard and dimensions
- Actual working pressure
- Minimum and maximum operating temperature
- Working medium
- Required installation orientation
- Required cracking pressure, when critical
- Spring material
- Sealing material
- Quantity by size
- Product marking and packaging requirements
OEM and Project Supply
SUNRICH FLOW works with manufacturing partners to coordinate
specifications, production requirements, quality follow-up,
marking and packaging for international buyers.
For replacement or OEM projects, drawings,
thread information and operating conditions can help
confirm the required valve configuration.
Frequently Asked Questions
What material is this valve made from?
The current specification lists SUS304 stainless steel.
What is the working pressure?
The listed working pressure is 1.6 MPa.
What sizes are available?
DN15, DN20, DN25, DN32, DN40 and DN50.
What is the working-temperature range?
The listed range is -30°C to 120°C.
Does this valve operate automatically?
Yes. The spring-assisted mechanism opens and closes
according to flow conditions.
Which thread standard is used?
The current technical sheet does not identify
one fixed thread standard. Confirm the required
connection before ordering.
Looking for SUS304 Vertical Spring Check Valves?
Send us the required DN size, thread standard,
working medium, pressure, temperature and quantity.
SUNRICH FLOW can review the specification
and prepare a quotation for your project.