General requirements for valve installation:
(1) The valve should be located in an accessible, easy to operate, maintain the place. Valves on a row of pipes (such as pipes leading to and from the installation) should be centrally located and considered to be equipped with operating platforms and ladders. Parallel arrangement of valves on the pipeline, the centerline should try to get together. The clearance between the handwheel should not be less than 100mm, in order to reduce the pipe spacing, the valve can be staggered layout.
(2) Partition valve equipment, when conditions permit should be directly connected with the device nozzle, or as close to the device. This system pressure test can test more pipes, maintenance can also remove (or separate) equipment without affecting the system.
(3) Accident handling valves, such as fire-fighting water valves, fire-fighting steam valves, etc., should be decentralized and take into account safe operation at the time of the accident. This type of valve to be arranged in the control room, behind the safety wall, the plant door, or with the accident at a safe distance between the zone, so that a fire accident, the operator can safely operate.
(4) Valves on the bottom of equipment such as towers, reactors, vertical vessels, etc. shall not be arranged in the skirt.
(5) branch pipe from the main pipe, usually close to the root and the horizontal pipe segment is set on the shut-off valve.
(6) lifting check valve should be installed in the horizontal pipe, vertical lifting check valve can be installed in the pipe flow from the bottom of the vertical pipe. Swing check valve should be installed on the level of priority pipeline, can also be installed in the pipe flow from the bottom of the vertical pipeline. The bottom valve should be mounted on the riser end of the suction pipe of the centrifugal pump.
(7) The center of the hand wheel of the valve arranged around the operating platform should not be more than 450mm away from the edge of the operating platform. When the valve stem and handwheel extend above the platform and the height is less than 2 meters, it shall be so as not to affect the operation and operation of the operator .
(8) The valve of the underground pipe should be located in the pipe ditch or valve well, if necessary, should set the valve extension rod. Fire water valve wells should have obvious signs.
Valve is the most appropriate installation height is about 1.2 meters from the operating surface.
Horizontal pipe on the valve stem direction can be determined in the following order: vertical upward. Level. Tilt up 45 °. Tilt down 45 °. Avoid vertical downward.
Horizontal rod valve installation, when the valve is opened, the valve stem shall not affect traffic
Product Name
Pimobendan
CAS No.
74150-27-9
Appearance
White Powder
Molecular formula
C19H18N4O2
Melting Point
Approximate 242 ℃
Molecular weight
334.37
Heavy metals
≤10ppm
Density
1.36
Water
≤0.09%
EINECS No.
211-390-9
Assay
99.62%
Storage
Cool and dry in a sealed container
Sulphated ash
≤0.10%
Shelf Life
3 years
Related substances(HPLC)
impurity A : ≤0.10%
Production Capacity
10 tons/year
impurity B : ≤0.10%
Trademark
Custchem
Any other impurity: ≤0.10%
Origin
China
Total impurity:≤0.20%
Synonyms:
PIMOBENDAN; 3(2H)-Pyridazinone,4,5-dihydro-6-[2-(4-methoxyphenyl)-1H-benzimidazol-6-yl]-5-methyl-; 4,5-Dihydro-6-[2-(4-methoxyphenyl)-1H-benzimidazol-5-y1]-5-methyl-3(2H)-pyridazinone; PIMOBENDANEHCL; PChemicalbookimobendam; 3(2H)-Pyridazinone,4,5-dihydro-6-2-(4-methoxyphenyl)-1H-benzimidazol-5-yl-5-methyl-; 3(2H)-Pyridazinone,4,5-dihydro-6-[2-(4-methoxyphenyl)-1H-benzimidazol-5-yl]-5-methyl-(9CI); dl-Pimobendan
Application:
Pimobentan is a chemical used to treat mild, moderate or severe congestive heart failure caused by atrioventricular valve insufficiency or myocardial hypertrophy in dogs.
Pimobendan Pill,Pimobendan For Dogs,Active Pharmaceutical Ingredient Pimobendan,Pimobendan Cas 74150-27-9
Fuxin Custchem Fine Chemical Co., Ltd. , https://www.custchemvip.com