What is the difference between a trunnion ball valve and a floating ball valve?

A trunnion ball valve has the ball supported by upper and lower trunnions (stems), making it ideal for large diameter (DN150+) and high-pressure applications (Class 600–2500) with lower operating torque. A floating ball valve has the ball free to float against the downstream seat, providing bubble-tight sealing for smaller sizes (DN15–DN250) at lower to medium pressures (Class 150–1500).

What certifications do TANGGONG ball valves have?

TANGGONG ball valves are certified to API 6D (pipeline ball valves), API 607 (fire-safe), CE (European), TUV, SGS, and ISO 9001:2015. The manufacturing facility in Wenzhou, China has been certified since 1990.

What size and pressure range are available for TANGGONG ball valves?

TANGGONG manufactures ball valves from DN15 (1/2") to DN2000 (80") in sizes, and from Class 150 (PN20) to Class 2500 (PN420) in pressure ratings. Custom sizes and pressure classes are available on request.

Which industries use TANGGONG ball valves?

TANGGONG ball valves are used in oil & gas pipelines, petrochemical plants, power stations (thermal, hydro, nuclear), marine vessels, LNG terminals, water treatment, and metallurgical industries across 35+ countries.

What is the lead time for ball valve orders?

Standard ball valve orders are typically delivered within 3–7 business days for in-stock items. Custom or large-scale orders typically require 4–8 weeks depending on specifications and quantity.

Forged Stainless Steel Ball Valve

Name: TANGGONG Industrial Ball Valve Series
Brand: TANGGONG VALVE GROUP
Availability: InStock
Rating: 4.7 (56 reviews)

Design and manufacturing: GB/T12237-1989;API608
The structural length: GB/T12221-1989;GB/T15188.1-1994;ASME/ANSIB 16.10
Connection forms: JB/T 79.1-4-1994;ASME/ANSI B 16.5
Inspection and test: GB/T13927-1992;API598
Caliber: DN50~DN600 1/2"~24"
Drive mode: Manual, worm gear, pneumatic, electric, etc
Pressure: PN1.6MPa~PN25.0MPa, Class 150-Class2500

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Product Detail

Unique feature and use
1、Anti‑curing stress cracking: The valve contact medium's material is corrodes Engineer according to the US the association NACE0 1‑75 standards to carry on the choice, and carries on the superficial nickel plating according to the standard, can satisfy the curing environment operating mode the request.
2、Make the packing material with the polymer or the metal, in the high temperature, the high‑pressured operating mode has the fine sealing property.
3、The establishment stuffing box, prevents the valve cavity pressure anomly to elevate causes the valve lever to depart, increases ets seals the structure but actually, can guarantee that the padding seals reliably.
4、Widely is suitable for medium pipelines and so on chemical industry, refinery, oil gas, natural gas, steel and iron.
Performance Specifications
Test pressure Unit: MPa

PN	Max temperature Working pressure	Case Test pressure	Gas Seals test pressure	High‑pressure sealing test pressure
1.6	1.6	2.4	0.6	1.76
2.5	2.5	3.8	0.6	2.75
4.0	4.0	6.0	0.6	4.4
6.4	6.4	9.6	0.6	7.1
10.0	10.0	15.0	0.6	11.0
16.0	16.0	24.0	0.6	17.6
20.0	20.0	30.0	0.6	22.0
25.0	25.0	37.5	0.6	27.5
Class 150	2.0	3.0	0.6	2.2
Class 300	5.0	7.5	0.6	5.5
Class 600	10.0	15.0	0.6	11.0
Class900	15.0	22.5	0.6	16.5
Class 1500	25.0	37.5	0.6	27.5

Terms of use：

Shell material	Seat Material	Applicable medium temperature	Applicable temperature
Carbon Steel C	PTFE	≤150℃	Water, steam, oil, etc.
Carbon Steel C	Stainless steel	≤425℃	Water, steam, oil, etc.
Chrome P‑type nickel‑titanium steel	PTFE	≤150℃	Nitric acid
Chrome P‑type nickel‑titanium steel	Stainless steel	≤200℃	Nitric acid
Chrome‑nickel steel R‑Mo Ti	PTFE	≤150℃	Acetic acid
Chrome‑nickel steel R‑Mo Ti	Stainless steel	≤200℃	Acetic acid
Cr‑Mo steel I‑V	Hard alloy	≤550℃	Steam, metallurgical, energy, etc.

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