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.

Fixed ball valve

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

TG003 Fixed ball valve
Design and manufacturing: GB/T12237-1989;API608
The structural length: GB/T12221-1989;ASME/ANSI16.10
Connection forms: JB79.1-2;ASME/ANSI B 16.5
Inspection and test: GB/T13927-1992;API598
Caliber: DN50~DN1400 2"~56"
Drive mode: Manual, worm gear, pneumatic, electric, etc
Pressure: PN1.6MPa~PN6.4MPa, Class 150-Class600

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Product Detail

Ball valves control fluid flow by rotating the ball core, featuring quick operation, reliable sealing and low flow resistance. They are used for cut‑off, distribution and flow diversion of media.

Suitable for water, oil, gas, steam and chemical fluids. Widely used in petroleum, natural gas, chemical, power, water supply & drainage, HVAC, metallurgy and light industry, applicable for normal‑temperature, high‑pressure, high‑temperature and corrosive working conditions.

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
Class 150	2.0	3.0	0.6	2.2
Class 300	5.0	7.5	0.6	5.5

Terms of Use

Hell material	Seat material	Applicable temperature	Applicable media
Carbon Steel C	PTFE	≤150℃	Water, steam, oil, etc.
Carbon Steel C	Counterpoint polystyrene	≤250℃	Water, steam, oil, etc.
Chrome nickel‑titanium steel P‑type	PTFE	≤150℃	Nitric acid
Chrome nickel‑titanium steel P‑type	Counterpoint polystyrene	≤200℃	Nitric acid
Chrome‑nickel steel R‑Mo Ti	PTFE	≤150℃	Acetic acid
Chrome‑nickel steel R‑Mo Ti	Counterpoint polystyrene	≤200℃	Acetic acid

Structural characteristics and uses

1、Operation: ball bearings supported by the up and down, to reduce friction, eliminate the pressure as imports to promote the formation of the sphere and the great seal seat load caused by excessive torque.

2、Sealing performance and reliable (see Figure 1): PTFE elastic material embedded in stainless steel valve seat ring, the metal spring seat no end, to ensure adequate preload ring, valve sealing surface in the course of friction loss When the valve under the action of the spring to ensure good sealing performance.

3、Fire structure (see Figure 2): In order to prevent the sudden appearance of heat or fire to burn PTFE seals, large leak occurred, and contribute to the fire, the fire ball and set the seal ring between the valve seat, in the ring when burned, under the action of the spring force will quickly push the ball valve seat seal ring, the formation of metal to metal seal, play a certain degree of sealing effect. The fireproof experiment conforms to API 6FA and the API 607 standard requests.

4、Automatic pressure relief function (see Figure 3): When the valve is in a stagnant medium pressure in the cavity increased over the spring preload, the seat back from the ball, to the effect of automatic pressure relief, pressure relief valve seat after automatically reset.

5、Discharge tube: the upper and lower body were set to vent, to check whether the leak valve seat, at work, the valve is fully open or fully closed, the removal of the pressure in the cavity can directly replace the packing; to emissions cavity left in reducing pollution of medium on the valve. Auxiliary sealing set the system (customer needs when ordering please specify)

6、The auxiliary valve seat designed for emergency sealing system, once the seal damage or emergency situations cannot be sealed, through the auxiliary sealing system corresponding to the sealing surface sealant injection sealing surface can be repaired, to an emergency seal. When the transport medium or containing a small amount of contaminated particles, in order to protect the sealing surface and ensure that a reliable seal, the device can also be injected to the appropriate cleaning agents or lubricants on the sealing surface cleaning.

7、Widely used in food, medicine, petroleum, chemical, natural gas, steel, environmental protection, paper and other media to cut off pipeline transportation or circulation. The device can also be injected to the appropriate cleaning agents or lubricants on the sealing surface cleaning.

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