Globe Valve
The globe valves provided by Weldon mainly include straight pattern globe valve, Y pattern globe valve, both bolted bonnet and pressure seal bonnet type are available , which are designed and manufactured according to DIN and ASME, The globe valve is suitable for several media including water, steam, oil, gas, petrol products, nitric acid, acetic acid, etc.
The globe valve, also called stop valve, relies on the pressure of the stem, making the sealing surface between disc and seat closely fitted to prevent the circulation of the medium. As the short opening and closing stroke of stem, globe valve has a reliable cut-off function. Due to the change of the valve seat opening is proportional to the stroke of the valve flap, it is suitable for the flow regulation and frequent operation.
Design features:
Disc: Single disc by defaultand double disc is applied for larger pressure difference or bigger size, the flow diretcion can be from lower inlet to higher out let, and from higher inlet to lower outlet is normally used for refinery to ensure the protetc stem seal from leakage.
Flat disc, conical disc, and plug loose type disc can be made upon request.
Seat: Welded seat and integral seat.
Body - Bonnet Connetcion: Bolted bonnet (BB) is normally applied on CL150 - CL900, body bonnet seal is defaulted by gasket and RTJ ring. Pressure seal bonnet (PSB) is applied on CL1500 - CL2500 with pressure seal ring for body bonnet seal.
Packing: By default graphite packing is used, PTFE packing can be used on corrosive media. API 622 fugitive emission packing will be used upon request.
Back seat: Renewable back seat is applied on carbon steel and low alloy steel valve, body back seat is applied for stainless steel valve.
Actuation: Hand wheel and gear box are normally designed for cast gate valve based on different size and pressure rating; Eletcric, pneumatic or Chain wheel operation can be provided upon request.
Product Range:
Size: 2 Inch - 24 Inch (DN50 - DN600).
Pressure Rating: Class 150 LB - 2500 LB (PN16 - PN420).
Material: Carbon steel, Stainless steel, Alloy steel, including WCB, GS-C25, LCB, LCC, LC1, LC3, CF8, CF8M, CF3, CF3M, WC6, C5, C9, C12, 4A, 5A, MONEL, ALLOY20, C95800
Connetcion End: BW, RTJ, Flanged.
Operation: Handwheel, Gearbox, Eletcric, Pneumatic.
Design & Manufacture Standard: ASME B16.34, BS 1873, DIN 3356, Bolted bonnet, pressure bonnet, bellow seal bonnet, high/low temperature extended bonnet and ISO 15848 fugitive emission designed valves are available upon different request of services.
Test Standard: API 598, EN 12266.
The globe valve, also called stop valve, relies on the pressure of the stem, making the sealing surface between disc and seat closely fitted to prevent the circulation of the medium. As the short opening and closing stroke of stem, globe valve has a reliable cut-off function. Due to the change of the valve seat opening is proportional to the stroke of the valve flap, it is suitable for the flow regulation and frequent operation.
Design features:
Disc: Single disc by defaultand double disc is applied for larger pressure difference or bigger size, the flow diretcion can be from lower inlet to higher out let, and from higher inlet to lower outlet is normally used for refinery to ensure the protetc stem seal from leakage.
Flat disc, conical disc, and plug loose type disc can be made upon request.
Seat: Welded seat and integral seat.
Body - Bonnet Connetcion: Bolted bonnet (BB) is normally applied on CL150 - CL900, body bonnet seal is defaulted by gasket and RTJ ring. Pressure seal bonnet (PSB) is applied on CL1500 - CL2500 with pressure seal ring for body bonnet seal.
Packing: By default graphite packing is used, PTFE packing can be used on corrosive media. API 622 fugitive emission packing will be used upon request.
Back seat: Renewable back seat is applied on carbon steel and low alloy steel valve, body back seat is applied for stainless steel valve.
Actuation: Hand wheel and gear box are normally designed for cast gate valve based on different size and pressure rating; Eletcric, pneumatic or Chain wheel operation can be provided upon request.
Product Range:
Size: 2 Inch - 24 Inch (DN50 - DN600).
Pressure Rating: Class 150 LB - 2500 LB (PN16 - PN420).
Material: Carbon steel, Stainless steel, Alloy steel, including WCB, GS-C25, LCB, LCC, LC1, LC3, CF8, CF8M, CF3, CF3M, WC6, C5, C9, C12, 4A, 5A, MONEL, ALLOY20, C95800
Connetcion End: BW, RTJ, Flanged.
Operation: Handwheel, Gearbox, Eletcric, Pneumatic.
Design & Manufacture Standard: ASME B16.34, BS 1873, DIN 3356, Bolted bonnet, pressure bonnet, bellow seal bonnet, high/low temperature extended bonnet and ISO 15848 fugitive emission designed valves are available upon different request of services.
Test Standard: API 598, EN 12266.
The ANSI globe valves provided by Weldon are cast steel globe valve mainly designed and manufactured to provide maximum service life and dependability which follow API 603, ASME B16.34, ASME B 16.5, ASME B16.10, BS 1873, etc. The ANSI globe valves are used in many industrial applications including the oil and gas industry where requiring frequent operation and positive shut off.
The DIN globe valves provided by Weldon are designed and manufactured to German DIN 3356 standards, The DIN globe valves size from DN50 to DN600, pressure from PN16 to PN420, covering materials of cast iron, carbon steel, stainless steel, alloy steel, etc.
The pressure seal bonnet (PSB) globe valves provided by Weldon are adopted for high pressure service. Compared to bolted bonnet (BB) globe valve, the pressure seal bonnet joints seals increase when the internal pressure in the globe valve increases, the higher the internal pressure, the greater the sealing force.
The Y pattern globe valves provided by Weldon include bolted bonnet type, welded bonnet type and pressure seal bonnet type, due to the small torque, low maintenance cost, the Y pattern globe valves are widely use in the petroleum, chemical, pharmaceutical, fertilizer, and eletcric power industries.
