跳至主要内容

NAFCO | Hydraulic Test of Brass Ball Valves

NAFCO | Hydraulic Test of Brass Ball Valves
 From: NAFCO | China Brass Ball Valves Manufacturer
Hydraulic tests are basic and important tests for brass ball valves, which ensures the brass ball valves are qualified of flow tightness, as well as the construction strength of brass ball valves, here we go with test details:
1. Leak-tightness test
1.1.Principle
This test shall verify the leak-tightness of the ball (internal tightness) and the ball valve assembly (external tightness) under cold water pressure.
1.2 Test
Install the ball valve in a test rig capable of maintaining the static pressures indicated in Table 1 below.
Leak-tightness test of brass ball valves
For test 1, close the ball using a torque which is not greater than the values in Table 2 below.
Operating torque of brass ball valves
Subject the ball valve to the pressures indicated in Table 1.
1.3 Requirement
The ball valve shall be leaktight at the pressures indicated in Table 1.
Brass ball valves China
1.2 Hydraulic strength
1.2.1 Principle
This test shall verify that the ball valve withstands a cold water hydraulic pressure.
1.1.2.2 Test
Install the valve in a test rig, capable of maintaining the static pressures indicated in Table 3 below.
Hydro Strength of brass ball valves
Subject the ball valve, with the ball open and the outlet closed to a pressure of (2,5 + 0,1) MPa {(25 + 1) bar} for Leaking at spindle sealing and end connection is allowed.
1.1.2.3 Requirement
The ball valve shall show no permanent deformation, rupture or breakage at the pressure indicated in Table 3.
China Brass Ball Valves
NAFCO is quality China brass valve manufacturer and supplier, have full line of brass valves China, brass ball valves, brass gate valves,brass radiator valves, brass angle valves, as well as relevant brass fittings. we supply kinds of brass valves and brass pipe fittings with reliable and stable quality, you are welcome to inquiry with us at sales@acrofluid.com.
 
 

评论

发表评论

此博客中的热门博文

OEM Brass Union Fittings for Gas Meter

OEM Brass Fittings with Union for Gas Meter From: NAFCO | OEM Brass Fittings China Manufacturer OEM produced forged brass fittings for gas meters, single-union and double-union design, sizes M20x1.5, 1/2". 1.Single-Union Brass Fittings for Gas Meters 2.Double-Union Brass Fittings for Gas Meters 2. Front View of  Single-Union Brass Fittings for Gas Meters 3. Top View of  Single-Union Brass Fittings for Gas Meters 4. Back View of  Single-Union Brass Fittings for Gas Meters 5. Buttom View of  Single-Union Brass Fittings for Gas Meters 6. Dis-assembly View of  Single-Union Brass Fittings for Gas Meters NAFCO is a professional OEM/ODM  brass fittings manufactuer and export, we can produce according to customers' drawing or samples.  Mainly focused on OEM brass fittings and brass valves, whatever requirements or idea, we can make it true for you. --------- The End ---------- This article is presented by  N...
发表评论
阅读全文

NAFCO | Torque Test of Brass Ball Valves

NAFCO | Torque Test of Brass Ball Valves Time:2018-08-09 From: NAFCO | Brass Valves China Manufacturer The tests described are type tests (laboratory tests) and not quality control tests carried out during manufacture. Tests shall be carried out in the sequence of this standard on the same brass ball valve. All tests shall be carried out with cold water of (20 ± 5) °C. The brass ball valve shall not be leaking or broken during the test, failing which the ball valve is not qualitified. 1.1.1 General Hold the ball valve in a rigid fixture as shown in Figure 1. a) All tests shall be carried out with connections to the valves (whatever their end fitting configurations) which are capable of withstanding the required torque values and bending moments (according to Table 1); b) if the inlet and outlet connection are not on a common axis, the torque tests shall be repeated with the connections reversed; c) ensure that the bending and torsional moments ca...
发表评论
阅读全文

NAFCO | How to Use Radiator Valves Correctly

From: NAFCO-China Radiator Valve and Brass Fittings Manufacturers China In first place, thermal metering users should always pay attention to matters of decoration, d o not change the position of the room thermostatic valves. Tips for installation of radiators and thermostatic valves: 1. Try not to wrap the radiators, because the radiator cooling received restrictions, resulting in a relatively slow increase in room temperature, increasing heat loss. 2. We must promptly repair if the radiator leaks which will increase heat loss. 3. As a result of polygons inside the tube caused by stagnant water circulation, affecting the heating effect, it is set in addition to the exhaust valve on the top floor, each radiator tail in accordance with the manual deflation valve, deflation action to be small, to prevent twist off To the water flow out promptly tighten the deflation valves. RELATED : NAFCO | Installation and ...
发表评论
阅读全文