Name: Cast Iron Globe Steam Stop Valve – Flanged PN16
Brand: Supreme Valves India
SKU: cast-iron-globe-steam-stop-valve-flanged
Rating: 4.8 (47 reviews)

Question 1

What is a globe valve and when should it be used for throttling applications?

Accepted Answer

A globe valve uses a movable plug (disc) that seats into a stationary ring to control flow. Unlike gate valves, globe valves are designed for throttling service and precise flow regulation. The Bonnet type (screwed, welded, or pressure seal) and body design (angle, Y-pattern, or standard) determine the application. For Saudi Arabian steam distribution systems in petrochemical plants, API 600 globe valves provide reliable shut-off and modulation. Globe valves are commonly used in fuel oil systems, lube oil systems, and instrument air lines where fine control is required.

Question 2

What is the difference between a standard globe valve and an angle globe valve?

Accepted Answer

A standard globe valve has inlet and outlet ports on opposite sides of the valve body, requiring straight-through flow path. An angle globe valve has inlet and outlet ports at 90 degrees, allowing flow direction change without pipe elbows. Angle valves are advantageous where space is limited or where quick pressure relief is needed. For UAE marine applications and Saudi Arabian shipbuilding projects, angle globe valves reduce pipe fabrication costs. Both types offer similar throttling characteristics, but angle valves have lower pressure drop due to the smoother flow path.

Question 3

What pressure ratings are available for API 600 globe valves?

Accepted Answer

Supreme Valves API 600 globe valves are available in Class 150 to Class 1500 ratings. Cast steel globe valves (WCB/CF8M) cover Class 150-600 for general service. For high-pressure steam and hydrocarbon service in Saudi Arabian refineries, forged steel globe valves (A105, F22, F91) in Class 600-1500 are specified. BS 1873 covers cast steel globe and angle valves for petroleum industry use. We also supply API 602 forged steel globe valves for smaller sizes up to 4 inches with high-pressure ratings.

Question 4

What materials are used for globe valves in high-temperature steam service?

Accepted Answer

For steam service above 450 deg C, Cr-Mo alloy steels (WC6, WC9, C12A) provide excellent high-temperature strength and creep resistance. For saturated and superheated steam in Saudi Arabian power plants, we recommend chrome-molybdenum steel bodies with Stellite-faced seats and 13Cr stems for hardness and wear resistance. Graphite packing is used for high-temperature applications above 350 deg C. For boiler feedwater and deaerizer service, stainless steel (CF8M) internals withstellitediscs provide corrosion resistance.

Question 5

How does a pressure seal globe valve differ from standard Bonnet designs?

Accepted Answer

Pressure seal globe valves use a sealing mechanism where the Bonnet is held in place by the internal pressure itself. As system pressure increases, the Bonnet seal becomes tighter. This design is preferred for high-pressure, high-temperature applications such as boiler outlets and main steam lines in power plants. Pressure seal design eliminates the need for a separate Bonnet gasket, reducing potential leak points. For Jeddah and Riyadh combined cycle power plants, pressure seal globe valves are standard for high-pressure feedwater and steam extraction service.

Question 6

What are the installation and maintenance requirements for globe valves?

Accepted Answer

Globe valves can be installed in any orientation, but the preferred orientation is with the stem vertical to ensure proper seating and drainage. For horizontal stem installation, the valve should be oriented so the disk closes by gravity (flow should push the disk closed). Before installation, remove all shipping protectors and verify stem movement. For maintenance, periodically inspect the seating surfaces for wear, replace packing if leakage occurs, and lubricate the stem threads. Never use force to close the valve against resistance, as this damages the seating surfaces.

Question 7

What documentation is required for globe valve export to Saudi Arabia?

Accepted Answer

Export documentation for Saudi Arabian projects includes Certificate of Origin (Indian Chamber of Commerce), commercial invoice, packing list, and bill of lading. For ARAMCO projects, Form 4-1514001 material specifications and ARAMCO-approved manufacturer lists are required. We provide EN 10204 3.1/3.2 material test certificates, hydrostatic test reports per API 598, and dimensional inspection certificates. For SASO/SABER certification, we supply product certificates and test reports from ARAMCO-recognized inspection agencies.

Component	Material Specification
Body & Bonnet	Ductile Iron (ASTM A536 / EN-GJS-400-15)
Stem / Spindle	SS 410 / SS 420
Seat / Trim	EPDM / NBR / Bronze

Parameter	Specification / Standard
Manufacturing / Design Standard	EN 1171 / AWWA C509 / BS 5163
Testing Standard	API 598 / EN 12266-1
Pressure Rating	PN16 / PN25

Cast Iron Globe Steam Stop Valve – Flanged PN16

Key Applications

Materials of Construction (MOC)

Technical Specifications