Introduction
Stop check valves are self-computerized valves that don't require any human intercession or outer control rather depend on the stream of liquid to open and close open. These valves ordinarily have two openings; one for liquid to enter the valve and other for liquid to take off. Just, a stop check valve enables a liquid to stream one way and forestalls it to stream backward course. These valves are found in numerous applications from home applications to enterprises. Stop check valves are utilized with various sorts of media like air, gases, fluid and so forth.
Maniks manufactures top quality stop check valve, they provide a comparatively efficient and economic solution where regulation, isolation and prevention of backflow of fluid are required as performance characteristics for a piping system.
Working
Stop check valve is a self-automated valve and it do not require any external control or human intervention, instead it relies completely on the flow of liquid to open and close.

These valves typically have two openings, one for media to enter in the valve and other for the liquid to leave. In simple words, stop check valves allow a media to flow only in one direction and prevents fluid to flow in opposite direction. These valves are basically used everywhere, including household uses and in every industry. Like other types of valves, Check type valves can be used with different types of fluids like air, gases, liquid etc.
The check valves are manufactured to open at very low differential pressure, allow fluent flow conditions and are very easy to disassemble for service and inspection. The (MSCA) stop check valve is embedded with vented cap and also has internal back-seating enabling the spindle seal to replace the valve still under pressure. Laser cut V-ports ensure excellent opening and closing characteristics to check valves (check valve (MCHV) 50-125/ Stop check valve (MSCA)). The Maniks check valve cone has built-in flexibility to provide a tight and precise closing towards the valve seat.
Stop Check Valve Design:

Connections:
• Butt-weld DIN (EN 10220)- ME 15 - 125 (½ - 5 in.)
• Butt-weld ANSI (B 36.10 Schedule 80), - ME 15 - 40 (½ - 1½ in.)
• Butt-weld ANSI (B 36.10 Schedule 40), - ME 50 - 125 (2 - 5 in.)
• Socket-weld ANSI (B 16.11),- ME 50 (2 in.)

Packing gland (MSCA-X):
• The "full temperature range" packing gland is the standard for the entire MSVL platform.
• This ensures perfect tightness throughout the whole temperature range: –60/+150°C (–76/+302°F).

Damping chamber:
• The chamber is filled with refrigerants (gas or liquid), which provides a damping effect when the valve opens and closes.

Housing:
• The housing is made from special, cold resistant steel.

Valve Cone:
• Valve cone with built in metallic stop - prevents damage to teflon ring in case of over tightening.

Spindle (MSCA-X):
• Made of polished stainless steel, which is ideal for O-ring sealing.

Installation:
The stop check valve must be mounted vertically with the cone downwards. The valve is designed to resist very high internal pressure. However, the piping system in general should be designed to avoid liquid traps and reduce the risk of hydraulic pressure caused by thermal expansion.
For further information about check valves refer to installation instructions for MSCHV-X/ MSCA-X. If cold refrigeration oil having low viscosity enters and settles in the damping chamber, problems with the check valve may arise. Consequently, it may be necessary to modify the valve for more viscous liquids by enlarging the hole to the damping chamber.
Features of Maniks Stop Check Valve:
1) Applicable to HFC, HCFC, R717 (Ammonia) and R744 (CO2).
2) Can be used in all chemical as well as petro-chemical applications.
3) Easy and Fast valve overhaul service. It is easy to replace the top part and no welding is needed.
4) Designed to open at a very low differential pressure of 0.04 bar (0.58 psig).
5) Designed with built-in damping chamber which prevents valve flutter, in case of lower refrigerant velocity and/or low level density.
6) Easy to disassemble for service and inspection.
7) Internal back seating of the valve enables replacement of the spindle seal when the valve is active (under pressure).
8) Optimal flow characteristics that provides quick opening to completely open position.
9) Protection against pulsation by built-in damping facility.
10) Housing and bonnet material is low temperature steel according to requirements of the Pressure Equipment Directive and other international classification authorities.
11) Temperature range: –60/+150°C (–76/+302°F)
12) Each valve is clearly marked with type, size and performance range.
For More Information:
http://www.maniks.com/stop-check-valves.html
Advantages of Maniks Stop Check Valve
• Provides best quality product
• Work experience of thirty years in stop valve manufacture
• Very economic product with superior quality

Applications of Maniks Stop Check Valve
• Household water supply taps
• Dishwashing machines
• Washing machines
• Bathrooms as well as main water supply control
• Used in gardens for water supply and control