Forged 3-Piece Ball Valve | ASTM A105 CS Body | SS316 Ball CFT Seat | Class 800# | Screwed SW BW Flanged | DN15–DN150 | Oil Gas Refinery | KELOR

Description

Forged 3-Piece Ball Valve | ASTM A105 CS Body | SS316 Ball | CFT Seat | Class 800# | Screwed / SW / BW / Flanged | DN15–DN150 | Oil & Gas / Refinery / Petrochemical | KELOR

Supplier: Krishna Industries (KELOR) – Ahmedabad, Gujarat, India
Established: 2017 | GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B
MOQ: 10 Nos | Body: ASTM A105 Forged CS | Ball: SS316
Seat: CFT | Pressure: Class 800# | Sizes: DN15–DN150

Forged 3-Piece Ball Valve Supplier in India

Krishna Industries (KELOR), based in Ahmedabad, Gujarat, is a B2B supplier of Forged 3-Piece Ball Valves — ASTM A105 forged carbon steel body — SS316 ball — CFT (Carbon Filled PTFE) seat — PTFE stem packing — Class 800# — screwed BSP/NPT / socket weld (SW ASME B16.11 Class 3000) / butt weld (BW) / flanged end connections — DN15 (½”) to DN150 (6″) — API 598 shell and seat leakage tested — GST invoice — MOQ 10 Nos — Pan India dispatch from Ahmedabad.

The forged 3-piece ball valve is the standard small bore isolation valve for Indian oil and gas, refinery, petrochemical, and high pressure process plant piping — specified wherever Class 800# pressure rating is required, forged body integrity is mandatory, and in-line seat replacement without cutting pipeline welds is essential to minimise maintenance downtime.

Forged vs Cast Body — Why Forged for Class 800# Service

3-Piece Body — Maintenance Advantage in High Pressure SW and BW Piping

End Connection Selection — Class 800# Service

CFT Seat vs Virgin PTFE — Why CFT for Class 800# Service

Technical Specifications

Applications in Indian Industries

• Oil and gas — upstream and midstream — instrument root valves on wellhead and gathering station manifolds — DN15–DN25 screwed BSP or SW Class 800# — drain and vent valves on gas gathering line piping — block valves on chemical injection skids — ONGC, IOCL, HPCL midstream piping — forged A105 Class 800# with CFT seat is standard specification for all small bore instrument isolation in Indian oil and gas
• Refineries — IOCL, BPCL, HPCL, Reliance — small bore Class 800# SW and screwed piping — instrument root valves on CDU, VDU, hydrotreater, catalytic reformer — sample valves on product streams — drain and vent valves on high pressure process piping — 3-piece body standard in refinery instrument hook-up for in-line maintenance
• Petrochemical and chemical — Dahej, Hazira, Surat — Class 800# SW ball valves on high pressure chemical process lines DN15–DN50 — block valves on pump minimum flow lines — isolation valves on pressure relief valve inlet and outlet — 3-piece body for in-line seat replacement during turnaround maintenance
• Power plants — thermal and gas turbine — boiler chemical dosing lines — drain valves on high pressure steam lines — instrument root valves on pressure transmitters on high pressure steam and water lines — Class 800# forged A105 with graphite packing for high temperature steam service
• CGD networks — city gas distribution — metering station instrument valves — CNG station piping — natural gas pressure reduction station instrumentation isolation — Indian CGD companies specifying Class 800# forged ball valves for metering skid and instrument manifold isolation

Related Products — Krishna Industries (KELOR)

• Three Piece Ball Valve (Cast Body) — WCB cast body — Class 150/300 — DN15–DN200 — standard industrial process isolation where Class 800# is not required
• SS Ball Valve — SS304 / SS316 body — for corrosive chemical service where CS forged body is not suitable
• WCB Globe Valve — for throttling service in high pressure CS process piping — same piping class as forged ball valve in many Indian process plant specifications
• Stud Bolts — ASTM A193 B7 — standard fastener for Class 600+ flanged joints — supplied with flanged end forged ball valve orders
• Y Strainer — install upstream of forged ball valve on chemical injection or sample lines — removes particulates that accelerate CFT seat wear

Frequently Asked Questions

1. What is Class 800# and why is it forged body only?

Class 800# is a pressure-temperature rating defined in ASME B16.34 Table 2, which applies exclusively to forged valve bodies. The standard defines two tables — Table 1 for cast bodies (Class 150, 300, 600, 900, 1500, 2500) and Table 2 for forged bodies (Class 800, 1500, 2500). Class 800# does not appear in Table 1 because cast bodies cannot achieve the same pressure integrity as forged at small bore without disproportionately heavy wall thickness. ASTM A105 forged body at Class 800# provides approximately 138 bar working pressure at 38°C — dropping with temperature per the ASME B16.34 P-T table. For any Indian project specifying Class 800# on the valve data sheet, a forged body is mandatory — a cast WCB valve cannot be supplied as Class 800#.

2. Why specify 3-piece body for socket weld or butt weld end connections?

When a ball valve has permanent weld end connections (SW or BW), replacing a worn seat or damaged ball in a 1-piece valve requires cutting the weld, removing the valve, welding in a new valve, performing PWHT if specified, and RT of the new weld — a full day per valve requiring welders, NDT technicians, and PWHT equipment. A 3-piece ball valve eliminates this entirely — four body bolts are undone, the centre body slides out with ball and seats, maintenance is completed, and the valve is back in service in 30–60 minutes without touching the welds. Over a 20-year plant life with multiple seat replacements, the 3-piece design saves substantially more than its cost premium over 1-piece body valves.

3. What is CFT seat and why is it preferred over virgin PTFE for Class 800# service?

CFT (Carbon Filled PTFE) contains 15–25% carbon filler in a PTFE matrix, making it significantly harder and more dimensionally stable than virgin PTFE. Virgin PTFE cold-flows under sustained high pressure — the seat deforms into the ball surface and the valve becomes difficult to operate after extended time in one position. CFT resists cold flow, wears more slowly in high-cycle service, and maintains consistent sealing performance across pressure and temperature cycles. For Class 800# oil and gas and refinery service where valves are cycled frequently and seat replacement requires plant shutdown, CFT seat life advantage over virgin PTFE translates directly to lower maintenance frequency and cost.

4. Can a forged 3-piece ball valve be used for throttling?

No — a ball valve is an on/off isolation valve only. In the partially open position, high velocity flow through the restricted ball opening causes severe erosion of the ball surface and CFT seat edge. For flow control in Class 800# high pressure small bore service, a forged needle valve or globe valve is the correct specification. Automated forged ball valves (pneumatic or electric actuated) are used for remote on/off switching — not for modulating control.

5. What is the MOQ?

MOQ is 10 Nos. Refinery and petrochemical project orders — typically 50 to 2,000+ Nos across sizes and end connection types — with API 598 test certificate, MTC for ASTM A105 body and SS316 ball, dimensional inspection report, and GST invoice. Fire safe (API 607) certification on request. WhatsApp body material, ball material, seat material, end connection type, size list, pressure class, and quantity for project pricing within 2 hours.

Conclusion

Krishna Industries (KELOR) supplies Forged 3-Piece Ball Valves for high pressure small bore isolation in Indian oil and gas, refinery, petrochemical, power plant, and chemical plant piping — ASTM A105 forged carbon steel body — SS316 ball — CFT (Carbon Filled PTFE) seat — Class 800# — screwed BSP/NPT / socket weld ASME B16.11 Class 3000 / butt weld / flanged — DN15 (½”) to DN150 (6″) — API 598 tested — fire safe API 607 on request — GST invoice — Pan India dispatch from Ahmedabad. WhatsApp end connection type, size list, and quantity for project pricing within 2 hours.