Three-Piece ball valve
EA-307 Series
PED Category I, II
EA-307 User Manual
English Version
[DRAFT VERSION]
For use for company in Europe who will place the product on the market. Please amend which necessary.
Document No: 3-29-06
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92/6/10 |
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Eayuan Metal Industrial Co., Ltd.
3F-8, No. 665, Sec. 2, Wu Chuan W Rd.,
Taichung, Taiwan, R.O.C.
Contents
1.General Precautions
2.Product Description
3.Design Specification
4.Pressure Temperature Ratings
5.Delivery Condition and Storage
6.Installation and Operation
7.Maintenance
8.Torqure Data
9.Corrosion Data
Page- 2~3
Page- 4~6
Page- 7
Page- 7~8
Page- 8
Page- 9~12
Page-13~15
Page-16
Annex 1.
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1.General Precautions
a. Material Selection:
The possibility of material deterioration in service and the need for periodic inspections is depended on the contained fluid. Carbide phase conversion to graphite, oxidation of ferrite materials, decrease in ductility of carbon steels at low temperature (even in applications above -29 ) are among those items. Even information about corrosion data is provided in this user manual, the user is requested to take attention or consideration to determine the suitability of material in their application.
b. Pressure-Temperature rating:
The Pressure-Temperature rating is considered for static pressure. Please refer to P & T rating section on page 9 for working precaution. The allowable temperature is between -29 and 180 , Do not exceed the temperature range to avoid danger accident happen.
c. Fluid thermal expansion:
Pressure, built-up in the body cavity by heating volatile fluid, can damage the seats or the ball. The hole in the ball beneath the stem slot can equalize pressure between body cavity and the line when valve in the open position. An optional internal pressure equalizing hole drilled in upstream side of ball is suggested for certain applications e.g. ammonia, chlorine, LPG, for pressure equalization when valve in the close position.
d. Static electric effect:
The ball valves are provided with anti-static devices for ball-stem-body. When service conditions require electrical continuity to prevent static discharge, the user is responsible for specifying static grounding.
e. Fire safe condition:
Generally, the application of the valve shall comply with the Pressure-Temperature rating range. If the risk of fire is major effect, user is recommended to select our fire-safe products, which with API-607 4th edition approval. Contact to the valve distributor or manufacturer for details.
f. Liquids with high fluid velocity:
When ball valves must be operated frequently on liquids with very high velocity, a check shall be made with the valve distributor or manufacturer for appropriate
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advice to minimize the possibility of seat deformation, especially when they are highly pressurized on high-temperature line.
g.Throttling service: Ball valves are generally not recommended for throttling service, where both the fluid flow and the leading edge of the ball can damage or deform the resilient ball seats causing leakage. High fluid velocity or the presence of solid particles in suspension will further reduce seat life in throttling applications.
h.Do not open the bonnet or cap when bearing pressure. Valve is not equipped with pressure access device. User should check it by other method through its piping system.
i.No touch the surface of valve on high temperature.
j.Not allowed for unstable fluid, otherwise specified with catogory III in Declaration of conformity or/and in this user manual.
k.Lock design on the handle to avoid the valve operated by non-related people is optional requested by the user.
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2. Product Description
2.1Feature
a.STANDARD type, FULL BORE ball valve.
b.Blowout proof stem.
c.Anti-static devices for ball-stem-body.
d.Pressure balance hole in ball slot.
e.Pressure self-relief seat to prevent pressure built up.
f.Lock design on the handle is optional
2.2Product specification
The scope of product specifications are as following
DN |
PN63 |
DN |
PN63 |
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DN15 |
Art .3 para. 3 |
DN50 |
Category II |
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DN20 |
Art .3 para. 3 |
DN65 |
Category II |
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DN25 |
Art .3 para. 3 |
DN80 |
Category II |
DN32 |
Category II |
DN100 |
Category II |
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DN40 |
Category II |
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2.3 Material of construction and Common dimension
307-1/2”~2”see Fig-1
307-2-1/2”~4” see Fig-2
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Fig-1
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