Celeros FT manufactures the Copes-Vulcan general service and severe duty control valves, desuperheaters and direct steam converting valves, as well as reciprocating, centrifugal, multi-stage and screw type pumps, filtration systems and strainers.
MULTIPLE NOZZLE SPRAY DESUPERHEATER (MNSD)
OFFERS HIGH TEMPERATURE CAPABILITIES AND LOW COOLANT CLASS V LEAKAGE RATING
The Multiple Nozzle Spray Desuperheater offers optimum performance and rangeability in a variable spray tube design. The Model MNSD-V fills the performance gap between the limited capability of a simple mechanical spray type desuperheater and the virtually unlimited capability of Copes-Vulcan’s Variable Orifice Desuperheater (Model VO). And, the MNSD-V offers high temperature capabilities and low class V leakage rating.
FEATURES
• Temperature control to within 15°F (8°C) of saturation with the ability to hold set point within a tolerance of 10°F (6°C)
• Standard maximum available Cv of 10.5 (Kv of 8.9)
• Waterflow turndown of 150:1 or higher
• User friendly design — nozzles and trim assembly can be removed without disconnecting actuator
• No need for separate cooling water control valve
• Designed for applications with temperatures up to 1150°F (620°C)
• Available in standard classes 600, 900, 1500 and 2500 per ANSI B16.5
• Cooling water inlet pressures up to 3500 psig (24 MPag) allowable standard (higher pressures allowable per application)
• ANSI Class V FCI 70-2 tight shutoff capability
• Suitable for vertical or horizontal installation
• Standard ANSI connections: 3″ (80mm) raised face flange (steam) 1.5″ (40mm) raised face flange (water)
• Designed for high thermal fatigue life
Many applications require turndowns in excess of that offered by a simple mechanical spray desuperheater. Many applications require turndowns in excess of that offered by a simple mechanical spray desuperheater but do not necessarily warrant the expense or require the additional refinements offered by the Variable Orifice Desuperheater. Many of these intermediate duties can be met with a steam atomizing type desuperheater (SA-35), but atomizing steam is often not available, or the additional installation and operational expense is not economically justified. The Multiple Nozzle Spray Desuperheater has been designed for these applications. The MNSD-V Desuperheater automatically controls the cooling water flow with the ability to modulate and shutoff. A separate cooling water control valve is not required as the unit itself controls variations in required coolant flow. Unlike competitive models that can only operate with relatively low water inlet pressures, the MNSD-V can be supplied to accept cooling water inlet pressures to 3500 psig (24 MPag).
DESIGN AND PRINCIPLE OF OPERATION
The MNSD-V consists essentially of a cage-guided plug situated within the nozzle tube just behind the discharge nozzles. The nozzle tube assembly fits up into the bore of the mounting flange and is locked in place with a threaded ring. This junction enables the cooling water inlet connection to orient in any direction relative to the position of the discharge nozzle spray at time of assembly. * Field alteration of this orientation is also quite easy. The MNSD-V Desuperheater head offers a means of mounting the unit to a companion flange on the main header. It also provides an inlet connection for the cooling water, a gland assembly for stem sealing and a mounting arrangement for the dependable Copes-Vulcan Model 700 Diaphragm Actuator.
TYPICAL PRODUCT APPLICATIONS
DISCHARGE NOZZLES
The multiple nozzle arrangement located near the end of the nozzle tube is composed of up to 22 uniquely designed discharge nozzles arranged in an overlapping manner to offer an extremely smooth flow characteristic. The quantity, individual sizes, and placement of the discharge nozzles are selected for each application to optimize capacity, maximize controllability and rangeability.
COOLING WATER
The cooling water is admitted to the nozzle tube assembly through the branch in the mounting head. It reaches the lower portion of the nozzle tube assembly as the plug exposes the nozzles. With the plug seated, no cooling water can reach the discharge nozzles. As the plug is extended by the actuator under the signals of the temperature control loop, cooling water is throttled at each exposed nozzle through flow charaterization slots located just prior to the discharge nozzles.
Our Desuperheaters Offers:
• Ring cooler with spring-loaded nozzles
• Venturi cooler with annular gap or nozzles (swirl atomization)
• Motive steam assisted desuperheater
• Multi-stage, controlled nozzle desuperheater
For more information you can email our Sales Manager directly at frikkie@kvcontrols.co.za
KV Controls – a leader in offering superior valves solutions to Industries such as Chemical, Petro-chemical, Refining, Mining & Minerals, Pulp & Paper, Sugar, Power generation and Hydrogen. Our Know-how in applying Control & Isolation valves technology adds value to our client’s operation, lowering cost of ownership. KV Controls mission is world class prompt service with business integrity. Our Safety Management System is accredited (certified) to ISO 45001:2018 Our Main-Office is situated in Naledi Industrial Park, Sasolburg, South Africa with other offices in Port Elizabeth (EC) and Richards Bay (KZN). We have a network of distributors throughout South Africa and neighbouring countries ensuring support on your doorstep.
