Non-rising Stem Gate Valve, API 600, Ductile Iron, DN50, PN16
Key Specifications / Features
The China Non-rising Stem Gate Valve is designed to meet the API 600 standard, ensuring high quality and reliability. It features a durable ductile iron body, available in GGG40 and GGG50 grades, providing excellent strength and corrosion resistance. The valve has a DN50 nominal diameter, equivalent to 2 inches, and is rated for PN16 and Class 150 LB pressure classes, making it suitable for a wide range of industrial applications. The soft seal design ensures a tight closure, while the RF flanged connection offers easy installation and main
Detail Information
Product Name: Non-rising Stem Gate Valve, Soft Seal
Design Standard: API 600
Body Material: Ductile Iron (GGG40, GGG50)
Wedge Material: Ductile Iron, EPDM Coated
Size: DN50, 2 Inch
Pressure: PN16, Class 150 LB
End Connection: RF Flanged
Operation: Handwheel
Certificates: TA-Luft, ISO 15848-1, API 622, ect
Product Range
Materials: Ductile Iron, Carbon Steel, Stainless Steel
Size Range: DN40-DN500, 1-1/2 Inch - 20 Inch
Working Pressure: PN10, PN16, Class 150 LB
Design Standard: API 600, ASME B16.34
Flange Standard: ASME B16.5
Face to Face Standard: ASME B16.10
Testing Standard: API 598
Working Temperature: up to 120°C
Medium: Water, Oil, and Corrosive Liquids
The packing used in cast steel valves is the M800 series graphite packing,
with a graphite carbon content exceeding 99% and a sulfur content below 50 PPM.
The dynamic leakage rate, as tested according to API 622, is less than 12 PPM.
The static leakage rate is below 6 PPM.
All the gaskets used are low-emission gaskets certified by TÜV Rheinland TA-LUFT
ISO 15848-1 Valve Tested Case Example: NPS4 Class 300 Valve
4-inch 300 LB Globe Valve: ISO 15848-1 Test at Ambient Temperature for 205 Cycles, High Leakage Rate of 1.8×10−7, Maximum Body Leakage at 11.6 PPMV
API 624 Valve Test Case 1: 12-inch 150 LB Gate Valve
12-inch 150 LB Gate Valve
API 624 Test
Maximum Packing Leakage: 46.7 PPMv
API 624 Valve Test Case 2： 12-inch 600 LB Gate Valve
12-inch 600 LB Gate Valve
API 624 Testing
Maximum packing leakage: 32 ppmv
Fire Test Certification of Valve Packing
Fire Test Report and Certification for 4-inch Gate Valve with M800 Packing
ISO 15848-1 Valve Tested Case Example: NPS12 Class 300 Valve
12-inch 300 LB Gate Valve
ISO 15848-1 Test at Ambient Temperature for 205 Cycles
High Leakage Rate: 1.6×10−6
Maximum Body Leakage: 7.7 PPMV
The API 624 test for the API 600 WCB 12-inch 150 LB gate valve utilized an M600 low-emission graphite packing set.
The ISO 15848-2 Type A test for the API 600 WCB 2-inch 150 LB gate valve, which requires emissions below 50 PPMV, was conducted using an M600 low-emission graphite packing set.
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FAQs
What is a Non-Rising Stem Gate Valve?
A valve where the stem does not move vertically but rotates internally to raise or lower the gate. This design is ideal for installations with limited vertical space.
How Does a Non-Rising Stem Gate Valve Work?
The handwheel turns the stem, which in turn moves the gate up or down inside the valve body without changing the external height of the stem.
How Does a Rising Stem Gate Valve Work?
The handwheel lifts the stem and gate together, providing a visual indication of whether the valve is open or closed.
Which Valve Should I Choose?
Use a rising stem valve for above-ground applications where visibility and ease of maintenance are important.
Use a non-rising stem valve for underground or space-limited installations.
Conclusion
The choice between rising stem and non-rising stem gate valves depends on your specific application needs. For clear valve status indication and easy maintenance, go with a rising stem valve. For compact installations, a non-rising stem valve is the better option.
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