china manufacturing JKTL carbon steel fully welded carbon steel ball valve

JKTL fully welded ball valve conform to one or more of the following specifications for pressure,

temperating ratings and dimensions: ASME/ANSI, ISO 14313/API6D, ISO 10423/API6A,

ISO 14723/API 6DSS, DIN, AFNOR, British standards, ISO 9000 and API Q1.  

Materials used in ball valve construction are equivalent at all JKTL manufacturing plants. However,

the availability of local supplies, the need to conform to national standards and to offer various trims may

necessitate some variation. In corrosive applications, valve trims may be offered using various types of

alloy and stainless steel. For more information on material specifications and properties, contact us directly.

The torque stated are for guidance only, they have been obtained by measuring on new ball valve. The

torque is to be understood as the pull-off torque applicable for a closed, but recently activated ball valve.

The valves stated may rise to a factor of 1.5 after a long period of not being in service.

Ball valve in fully open position.

Medium: water.

Density in 1000kg/m³

KVS:

Sign explanation

Kv: m³ water per hour at pressure drop 1bar.

c: Flowrate of the media in m/sec.

V: Actual flow volume.

A: The area of flow in m² of the ball valve in question.

z: Coeffcient of resistance.

g: Density in kg/m³

Fire-Tested for Safety

JKTL fully welded ball valves can be supplied to API6FA, API607 and ISO 10497 standards. If industry

standards change or customer requirements vary from the above, please contact your sales representative.

Trunnion Mounted Ball Allows Low-Torque Operation

Regardless of size or pressure rating, every JKTL fully welded ball valve is trunnion mounted.

High-strength forged stems are located in PTFE impregnated stainless steel bearings for smooth,

accurate operations. Trunnion mounted stems absorb the thrust from line pressure, preventing excess

friction between the ball and seats, so even at full rated working pressure, operating torque stays low.

Test Valve Integrity

When the valve body is vented, the seat seal’s integrity is verified. This test can be performed with

the valve open or closed. Valve performance can also be validated by verifying valve seat seal integrity.

Features and Benefits

Upsteam Sealing

At low pressure, seat-to-ball contact is maintained by Belleville Springs. At higher pressures, seat contact

is reinforced by line pressure.