MREG-A and MREG-B are angle-way and straightway hand regulating valves, which act as normal stop valves in closed position.
The valves are available in two different versions – MREG-A and MREG-B designed for regulation purposes in liquid and expansion lines.
The valves are available in two different versions – MREG-A and MREG-B designed for regulation purposes in liquid and expansion lines.
The valves are designed to meet the strict quality requirements on refrigerating installations specified by the international classification societies and are carefully designed to present favourable flow conditions and accurate linear characteristics.
MREG-A and MREG-B are equipped with vented cap and internal back-seating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure.
Regulating Valves Features:
• Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2). Can be used in chemical and petro-chemical applications.
• Modular Concept: – Each valve housing is available with several different connection types and sizes. – Possible to convert MREG-A or MREG-B to any other product in the MSVL family (stop valve, stop check valve, check valve or strainer) just by replacing the complete top part.
• Fast and easy valve overhaul service. It is easy to replace the top part and no welding is needed.
• Designed to ensure perfect regulation
• Internal back-seating enables replacement of the spindle seal whilst the valve is active, i.e. under pressure.
• Easy to disassemble for inspection and possible repair.
• Max. operating pressure: 52 bar g (754 psi g)
• Temperature range: –60/+150°C (–76/+302°F)
• Acts as a normal stop valve in closed position.
• Housing and bonnet material is low temperature steel according to requirements of the Pressure Equipment Directive and other international classification authorities.
Regulating Valves Design:
Connections:
• Butt-weld DIN (EN 10220) – DN 15 - 65 (3/8 - 2½ in.)
• Butt-weld ANSI (B 36.10 Schedule 80) – DN 15 - 40 (3/8 - 1½ in.)
• Butt-weld ANSI (B 36.10 Schedule 40) – DN 50 - 65 (2 - 2½ in.)
• Socket weld (ANSI B 16.11) – DN 15 - 40 (½ - 1½ in.)
• FPT inside pipe thread, NPT (ANSI/ASME B 1.20.1) – DN 15 - 32 (½ - 1¼ in.)
Housing:
• Housing is Standard MSVA angle-way or straight-way housing allowing other inserts from the MSVL platform to be installed.
• Material is special, cold resistant steel
Valve Cone:
• Versions – MREG-A with an A cone and MREG-B with a B cone. The A cone is designed for expansion lines, while the B cone is designed for regulating purposes e.g. liquid lines.
• The valve cone is designed to ensure perfect regulation and provide an extensive regulating area. Irrespective of the refrigerant used, it is easy to obtain the correct capacity. A cone seal ring provides perfect sealing at a minimum closing momentum.
• The valve cone can be turned on the spindle. Thus there will be no friction between the cone and the seat when the valve is opened and closed.
Spindle:
• The spindle is made of polished stainless steel, which is ideal for O-ring sealing.
Packing gland:
• MREG-A and MREG-B
• The "full temperature range" packing gland ensures perfect tightness in the whole range: –60/+150°C (–76/+302°F). The packing glands are equipped with a scraper ring to prevent penetration of dirt and ice.
Regulating Valves Installation:
Install the valve with the spindle up or in horizontal position. The flow must be directed towards the cone.
The valve is designed to withstand 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 refer to product instruction for MREG- A and MREG-B.
Regulating Valves Technical Specification:
• Refrigerants Applicable to HCFC, HFC, R717 (Ammonia) and R744 (CO2). Can be used in chemical and petro-chemical applications.
• Temperature range –60/+150°C (–76/+302°F)


Special Services:

• Maniks offer special service for your existing system components for pneumatic pulse application, to recondition your inoperative valves and assure operating reliability as good as new. DO NOT scrap your valves (ONLY IMPORTED) unless inspected by our experts.
• We offer SPARE DIAPHRAGMS, PILOT SOLENOIDS and COILS for your EXISTING IMPORTED VALVES.
• We provide special enclosures for timers such as flame proof enclosures, SS enclosures, FRP enclosures, IP65 enclosures on request.
• We also cater to special requirement such as flame proof enclosures for valves.

http://www.maniks.com/regulating-valves.html