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* Check valves
o with threaded connector - Steel DN 4 - DN 50
o Full flow, no reduction
o Custom orders on request
o All dimensions subject to change without notice
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Sarasin-RSBD
Pressure Safety Devices
Sarasin RSBD manufactures and supplies a comprehensive range of pressure safety valves and safety devices. The variety of products covers all industrial applications in which protective action against overpressure is required.
Changeover Valves
Sarasin-RSBD R Type Changeover valve
Sarasin-RSBD DV Type Changeover valve
Sarasin-RSBD Starvalve RS type Changeover
Safety Relief Valves
Sarasin RSBD & SEBIM Safety Relief Valves
Sarasin-RSBD 71 Series Full Nozzle Pilot Operated Safety Relief valve
Sarasin-RSBD 78 Series Semi Nozzle Pilot Operated Safety Relief valve
Sarasin-RSBD 86 Series High Performance Full Nozzle Pilot Operated Safety Relief valve
Sarasin-RSBD 9 Series Portable Safety valve
Sarasin-RSBD MBP Atmospheric Relief valve
Sarasin-RSBD A7000 Series Safety Relief valve
Sarasin-RSBD Starflow S5
Sarasin RSBD - 71 Series Portable Pilot Operated Safety Relief valve
Sarasin RSBD - 63 Series Semi Nozzle Safety Relief valve
Starflow P3 Conventional Safety Relief valve
Starflow P5 Conventional Safety valve
Sarasin-RSBD Starflow P4 Balanced Safety Relief valve
Tank Blanketing Systems
Sarasin-RSBD Starblanketer
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Series 4200
ASME NB Certifi ed: Steam
Sizes 1-1/4 X 1-1/2 to 6 X 8. Actual orifi ce areas from 0.316 to 11.39 square
inches. Pressures from 15 psig to 1000 psig. Temperature limit to 1000 F. Steel
body and open bonnet with stainless steel trim. Chrome moly body above 800 F.
Double adjusting ring design to meet the blow down and overpressure standards of
Section I of the ASME Code. Temperature equalizing disc for maximum seat tightness.
Full nozzle design for longer life and ease of maintenance. One piece guide mounted
low in the body for positive alignment.
Applications: steam boilers
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Check valves are poppet style elements that allow free flow in one direction while preventing flow in the reverse direction. They can be used to isolate portions of a hydraulic circuit or to provide a free flow path around a restrictive valve.
Types:
Nose to Side Checks
Soft Seal Check Valve
Side to Nose Check Valve
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The check valves permit flow in one direction only; the operation of the valve is based on the movement of a small disc. The disc shifts within the housing as the pressure differential changes from forward to reverse. A flat surface on one side of the disc seals off flow, while the other side allows flow to pass.
The check valves offer low "cracking pressure" and a minimum differential forward flow, less than 0.005 PSI in the standard units.
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Specifications:
- Port Size: 1/2"
- Maximum Pressure: 15kgf/cm2
- Proof Pressure: 20kgf/cm2
- Material: ZDC-3
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Overpressure protection
Fields:
- Pharmaceutical and Biotechnical Industry
- Heating, Ventilation and Air Conditioning
- Machine and Process Industry
- Power Plants and Distribution
- Automotive Industry
Type: AORP
Adjustable over pressure control valves
Fields:
- Pharmaceutical and Biotechnical Industry
- Heating
- Ventilation and Air Conditioning
- Machine and Process Industry
- Power Plants and Distribution
- Automotive Industry
Type: D5-410_Over-Pressure-Valve
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The Copes-Vulcan Multiple Nozzle Spray Desuperheater offers optimum performance and rangeability in a variable spray tube design. The MNSD fills the performance gap between the limited capability of a simple mechanical spray type desuperheater and the virtually unlimited capability of Copes-Vulcans Variable Orifice Desuperheater. The MNSD offers high temperature capabilities and up to Class V leakage rating.
Features:
- Temperature control to within 15F (8C) of saturation with the ability to hold set point within a tolerance of 10 F (6C)
- Standard maximum available Cv of 10.5 (Kv of 8.9)
- Water flow turndown of 150:1 or higher
- User friendly design - nozzles and trim assembly can be removed without disconnecting the actuator
- No need for separate cooling water control valve
- Designed for applications with temperatures up to 1150F (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)(higher pressures on application)
- FCI 70-2/ANSI Class IV or Class V shutoff capability
- Suitable for vertical or horizontal installation
- Standard ANSI connections are 3" (80mm) raised face flange (steam) and 1.5" (40mm) raised face flange (water)
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In many paper mills steam is superheated and distributed at high pressure for efficiency reasons. The pipe sizes required to transport the high pressure steam are smaller due to the low specific volume of the steam, and turbine efficiency is optimized when high pressure superheated steam is used. Kadant Johnson desuperheaters are designed to reduce the temperature of superheated steam for optimal heat transfer and efficiency.
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Both steam pressure reduction and temperature reduction (Desuperheating) are done in a single valve making it an extremely efficient, cost effective and compact solution.
Features
- Compact Design
- High turndown (40:1)
- Reduced noise level
- Efficient cooling water atomization
- Reduced straight runs for pressure and temperature measurements
- Better control over change in flow
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The Valve is designed for precise control in pneumatic control circuits. It can be used as a relay valve to sequence specific signal operations or as a relief valve to limit pressure in a pneumatic system.
Fixed or adjustable pressure settings are available; the pressure range is 0-20 PSI. To adjust the valve, turn the adjusting screw clockwise to reach zero adjustment. Then turn the adjusting screw counterclockwise to the desired relieving or sequencing pressure. The valve can be supplied with an allen-wrench adjustment or a knob. The valve has straight ports for 1/16 I.D. flexible tubing, barbs for 1/16 or 1/8 tubing are also available.
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Pressure Relief Valve type LV / LNV
The safe and economic solution to protect your pump and plant against over-pressure.
Function:
The pneumatic Pinch Valve will be pressurized through the pressure relief section by a minimum differential pressure of 2 bar air supply over medium pressure. When the medium pressure in the pipeline increases, the Pinch Valve start to open and the overpressure passes trough the bypass and the Pinch Valve.
The rising and falling pressures can be controlled over pressure switches.
Type LV (if control air is available) and Type LNV (if control air is not available) are especially designed to handle products with solids, paste and fibers.
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Back pressure relief valves; Panel mounting available; Large flow rate
Material:Body-PVC; Diaphragm membrane-Viton+Teflon plate
Adjustable range:5~100 psig
Working temperature:60C
Working fluid:Water corrosive liquid
Mounting type:Straighted on pipe line
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Reliable Pressure Relief:
Hayward Pressure Relief Valves protect piping system components from damage due to over pressurization. The valves work by sensing system pressure. When the system pressure exceeds the set pressure, the force of the excess pressure moves the valve piston off its seat to relieve the excess pressure and diverts some of the flow out the discharge port.
Easy to Set Pressure:
Hayward Pressure Relief Valves can be set by hand, no tools are needed, to relieve pressures from 5 to 75 PSI. Each size of relief valve is designed to cover this complete pressure range with just one, non-wetted, plastic coated spring. There is no need to change springs for different pressure ranges as with ordinary relief valves.
Molded Gauge Port:
An integrally molded 1/4" NPT gauge port on the valve body makes installation of a gauge to monitor the relief pressure easy. No drilling or extra fittings are needed.
No Corrosion Failure:
These all plastic relief valves have no metal parts and will never fail, jam or stick because of rusted or corroded components. They require no painting or epoxy coatings to survive corrosive environments.
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The RV-5200 and RV-5300 Series operate as either a relief valve or low flow back pressure regulators. Adjustments are made through a non-rising stem available with an attractive knob, plain to allow insulation of OEM knobs, or flush for "back panel" applications. A typical application would be the use of a unit between a compressor and a load to prevent the compressor from "loading up" when dead-ended.
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Pilot Operated Relief Valve
In the mid-1940s, a new relief valve actuated with a pilot rather than a spring set a new standard for pressure control. The valve, manufactured over the years by companies like Garrett, USI, Axelson, and NUFLO, is now manufactured and sold by Cameron's Measurement Systems division. The NuFlo pilot-operated pressure relief valve is an example of a tradition of advanced design and high-quality manufacturing abilities. These valves offer advantages not found in other relief valves - spring or pilot operated.
TYPE HF
This is a full lift, pop-action valve with a fixed (5% to 7%) blowdown using a single non-flowing pilot. This type of valve is designed for gas and/or vapor service and is offered in sizes of 1" through 8" with operating pressures ranging from 20 psig to 6000 psig.
Type HL
This is a modulating valve with a fixed (3% to 5%) blowdown using a single non-flowing pilot. This valve is designed for gas, vapor and/or liquid service and is offered in sizes of 1" through 8" with operating pressures ranging from 15 psig to 1500 psig.
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Series 3800
ASME NB Certified: Air, Steam & Water
European CE Approved
Sizes 1″ X 2″ to 12″ X 16″. Actual orifice areas from 0.15 to 109 square inches. Pressures
from 20 to 6170 psig. Temperature range of -450 F to +500 F. Steel body and
bonnet with stainless steel trim. Semi-nozzle design.
The D to T orifices meet API Standard 526 covering orifice areas and center-toface
dimensions. Full bore designs available with 1″ through 12″ inlets and orifice
areas from 0.719 to 109 square inches giving maximum capacity for a given inlet size.
All stainless snap acting and modulating non-flowing pilot controls minimize product
loss and provide maximum resistance to corrosion.
Standard O-ring elastomer seat main valve and pilot control minimizes fugitive emissions
and allows operation within 95% of set pressure. Materials include Viton, Buna
N, ethylene propylene, silicone and Teflon. Optional materials of construction include
complete 316 stainless steel.
Applications: air, steam, gas, vapor, and liquid services where maximum seat tightness,
operating pressures and precise adjustment are required. Excellent for natural
gas pipeline and compressor service.
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Description
System-medium controlled overflow valves are simple and compact regulating devices which enable the flow to be precisely controlled; they are easily installed and maintained and control the pressure upstream of the valve without additional control elements being required. At the valve plug the upstream pressure to be controlled is in equilibrium with the force exerted by the valve spring.
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PTFE Pressure Relief Valves
Features
• High reliability
• Factory set
• Low pressure drop
• All mechanical
• Right-angle flow
• Flare type connection
• Bubble tight seal
Applications
• Special semiconductor equipment relief valve applications.
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Quik-Vent
Vacuum/Pressure Relief Valve
Series 684
Controls unsafe pressure conditions
The Quik-Vent vacuum / pressure relief valve is an excellent safety device for mounting on storage silos, bins or any other container to relieve excessive or unwanted air pressure that might be generated by a pneumatic conveying system or other process equipment.
Unsafe conditions are easily controlled by the Quik-Vent vacuum/pressure relief valve. Generous ports quickly exhaust air or gases to protect against sudden positive or negative pressure conditions.
Optional sensors are also available to provide an electrical signal to indicate when over or under pressure conditions are present.
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The Hoffman Specialty Series 2000 consists of main valves, pilot valves, wells and hardware kits. They are designed to meet a wide range of temperature, pressure and capacity requirements and provide accurate, dependable, low maintenance operation. The Series 2000 Regulators meet MIL Spec MIL-V-16733D (Type IV) and MIL-V-18433B (Type I, Style A, Class 2).
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Cepex designs and manufactures an extensive family of check valves that can be used for a wide range of applications. These valves provide an exact and reliable control of fluids, and have been designed to offer maximum modularity and flexibility.
Spring check and ball versions are available in PVC-U and Corzan CPVC. As with other Cepex valve products, check valves are available in accordance with several dimensioning standards (Metric, BSP, ASTM, NPT, British Standard, JIS...).
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This small rectangular fire damper can be installed in solid walls and ceilings and in lightweight partition walls.
The fire dampers are suitable for installation in walls and ceilings made of concrete or masonry and in lightweight partition walls. The damper installation is independent of the air flow direction.
The thermal release devices with the fusible links are removable from the outside and easy to revise.
All versions are additionally equipped with two more inspection ports.
square, rectangular
W: 200 800 mm
H: 100 200 mm
Fire resistance class:
K 90 acc. to DIN 4102
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Donadon SCD is a concave rupture disc with micro-scored calibrated section. Special feature of SCD is scoring in 6 sectors instead of 4 as usual in all competitors discs.
Opening in 6 petals allows a better opening reducing the risk of petal detachment even at high bursting pressure.
It is used with gas and liquids also in cycling and pulsating conditions without reduction of safety margins.
SCD disc reacts to excessive pressure in a few milliseconds without fragmentation.
It is especially suited for protection of pressure relief valves.
SCD disc may operate at 85% of the bursting pressure and has a very good resistance to corrosion due to the thickness pf the material employed. Corrosion resistance may be additionally improved by PTFE lining.
Vacuum support is normally not required.
Available in special execution certified Ex II 2GD according to European Directive 94/9/CE (ATEX).
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Rotary syphons have many advantages that permit their use at slow to moderate speeds. Since a rotary syphon moves with the rotating cylinder, it can be placed closer to the cylinder shell thereby reducing the level of condensate inside the cylinder. Kadant Johnson offers various types of rotating syphons including the conventional single syphon, the Rotocurve bent pipe rotary syphon and the LDR low differential rotary syphon.
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Pressure relief valve
- Reliable
- Compact form
- Maintenance free
- Use of non corrosive materials
- Easy disassembling and inspection
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Rupture discs and Safety valves may be used independently as primary safety devices or in conjunction.
Possible combinations are:
Disc and PSV in parallel: the disc is a second safety device in order to increase equipment safety (usually the rupture pressure of the disc is slightly above the setting of the valve). Typical application: liquefied gas tanks
Disc downstream a PSV in order to protect the PSV from corrosive chemicals present in the vent duct
Disc upstream a PSV: this solution allows combining the positive aspects of both devices: tightness of the disc and re-closure of the valve. In addition the discs protects the valve from corrosive or scaling process fluids, reducing the maintenance required by the more expensive and sensitive device. Main advantages are:
Protection of the valve from aggressive or scaling fluids
Avoid leakage due to valve scaling or corrosion (very important for dangerous fluids)
Reduce maintenance (cleaning, calibration)
Reduce the cost of the valve by using less expensive materials
Test the correct performance of the valve without plant shut-down and valve dismounting
The rupture pressure of the discs is the same of the setting of the valve; build up of pressure in the space between the disc and the valve must be monitored and avoided
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Valves, Clappers, Bursting discs
