Trunnion Mounted Ball Valve

Fully Welded Trunnion Mounted Ball Valve

Product Description

XDV Full welded ball valves are intended to be fitted as stop/shutoff valves in water and gas-supply systems, in the heat-power engineering, housing and communal services as well as in the process lines at chemical and oi-refining plants, at pulp-and paper milks production facilities.

XDV Full Weld Ball Valve Design Features

”Seamless Carbon steel or stainless Steel Body: All welded ball valve body is compact and streamline for maximum strength and minimum weight.

”stainless Steel Ball: The stainless steel ball is produced to extremely tight tolerances, and ground to within microns of perfect roundness to assure smooth operations and a tight seal.

”Optional Locking Device With Position Indicator: Instantly readable locking device that shows the valve operating position.

”Stem Bearings: These bearings are produced from an electrically conductive material that provides a safety grounded stem to eliminate static build-up and potential arcing.

”SEAT SEALS: The special 25% carbonized PTFE (Teflon)(G-453)seals tightly, yet allows easy. low-torque, quarter-turn operation.

”STAINLESS LABELS: Every label is permanently stamped, color coded with traceable serial numbers for each valve

”SEAT QUALITY FEATURES: Do not absorb water, and does not expand Chemical resistant, High friction characteristics Good temperature stability, Tested and approved up to 250℃

PDF download Contact Online Inqury

Product Range&Features

Size	2"~60"
Rating	150LB~2500LB
Body Materials	Carbon Steel, Stainless Steel, XDSS, etc.
Design Standards	API 6D/ASME B16.34
Trim	A105 ENP,13Cr, F304, F316
Face to Face Standards	ASME B16.10
Flange Dimension Standards	ASME B 16.5/ASME B16.47
Pressure Test Standards	API598,API 6D
Quality/Product Certifications	ISO9001, ISO14001, ISO18001
Fugitive Emissions	ISO 15848-1, API 622
NACE	NACE MR 0103 NACE MR 0175
Shutoff Class	API 598 (Zero Leakage), API 6D
End Connection	RF, RTJ, BW
Operation	Lever, Gear, Motor, Pneumatic, Gas Over Oil, Hydraulic

Product Details

NO.	PAPT NAME	MATERIAL-ASTM
1	O-RING	VITON
2	SPRING	INCONEL X750
3	SEAT	ASTM A105 ENP
4	SEAT SEAL RING	VITON
5	O-RING	VITON
6	TRUNION	ASTM A182 F6a
7	BODY	ASTM A105
8	SAET-RING	MOLON
9	O-RING	VITON
10	BONNET	ASTM A105
11	STEM	ASTM A182 F6a
12	BALL	ASTM A105 ENP
13	TRANSITIONAL SHORT PIPE	ASTM A105
14	STEM BEARING	SF-1
15	BOLT	ASTM A193 B7
16	O-RING	VITON
17	0-RING	VITON
18	GLAND	ASTM A105
19	SEAT INJECTION VALVE	ASTM A1025
20	STEM INJECTION VALVE	ASTM A1025
21	STEM INJECTION VALVE	ASTM A1025
22	SEWAGE DISCHARGE VALVE	ASTM A1025

Installation

Ball valves are normally installed in horizontal pipe with vertical stem.

These valves can also be installed with no limitation regarding the pipe or stem orientation.

However, in this case the actual pipe/stem orientation should be advised to allow for the right position of the drain plug.

Unless otherwise recommended by the manufacturing plant, the valve should be installed with the ball in the open position, to ensure that the seat rings are not damaged during installation.

Particular care should be taken with those valves equipped with ‘fail-close’ actuators.

For operating temperatures above 200°C (392°F) thermal insulation of the valve body is recommended.

Handling and lifting of the valves during installation MUST be performed following the same criteria and instructions described in previous points “2.2 Handling Requirements” and “2.3 Storage and

Preservation before Installation”.

Butt weld Valves

Position the valve and check the alignment with the pipe.

Proceed with welding, in accordance with the applicable welding procedure.

Important:

It is recommended to perform piping flushing before installation of the valve. If this is not possible, the valve must be set with the ball in full open position before starting with flushing.

For butt weld end valves

To avoid any damage to the gaskets, the temperature during the pipe welding and the heat treatment has to be monitored by a thermocouple placed in the seat grease injector holes.

Make sure to limit the temperature at maximum of 200°C.

This instruction has to be carefully followed especially in case there are not any transition piece (pup piece) welded to the valve.

Flanged End Valves

Valves with flanged ends should be treated as a single unit and should not be dismantled when installing to pipeline.

Before installing the valves, make sure that the flanges on the mating pipe are free from excessive grit, dirt or burrs, and that there is no mechanical damage to the flanges on the pipe.

When inserting the flange bolts, make sure the bolts are correct size to hold pressure and axial forces.

Troubleshooting guide

MALFUNCTION	PROBABLE CAUSE	SOLUTION
Leakage through the valve	Ball surface damage	Replace the ball
	Seat damage	Replace the seats or try with injection of sealant grease
	Not complete closure	Check Open/Close limits and settings
Ball movement not regular (actuated valves)	Dirt between ball and seats	Flush the inside, operating the valve 5 times
	Dirt between ball and body cavities	Flush the inside, operating the valve 5 times
	Not sufficient air supply flow	Confirm working conditions are as per request
	Not sufficient air discharge	Include quick exhaust valve
Valve torque too high	Seat damage	Replace the seats
	Dirt between ball and seats	Flush the inside operating the valve 5 times
	Dirt between ball and body activities	Flush the inside operating the valve 5 times
	Excessive Pressure or Temperature	Confirm working conditions are as per request
Stem leakage	Stem nuts loose	Tighten stem nuts
	Damaged stem seal surfaces	Replace stem
	Damaged stem seals	Replace stem seal or try with injection of sealant grease
Body seal leakage	Gasket damage	Replace gaskets
Body seal leakage	Excessive Pressure or Temperature Excessive load from piping system	Confirm working conditions are as per request Verify piping system architecture
Excessive valve noise	Error in valve sizing	Confirm valve sizing
Excessive valve noise	Not complete opening	Check Open/Close limits and settings
Fail in valve movement after electrical input (actuated valves)	Solenoid valve fail	Confirm power supply Replace the solenoid
Fail in limit switch signal	Un-correct settings	Check Open/Close settings
	Limit switch is broken	Replace limit switch
	Un-correct power supply	Confirm working conditions are as per request