HSV086 Series
General
HSV086
The SV086, the predecessor of the HSV086, has demonstrated its quality and usability for more than 25 years. Compared to the SV086, the HSV086 has been improved and modified according to current technology.
The HSV086 series consists of two types of safety shut-off valves:
- HSV086, the standard model with nominal diameters of 1”-12”
- HSVS086, with a two-stage release mechanism in nominal diameters > 16”
Both types offer overpressure and underpressure protection. The HSV086 and HSVS086 feature modular construction and are supplied with a standard control mechanism and sensing element. Both are suitable for operating pressures up to 100 bar. Nominal diameters up to 12” are available in pressure classes up to ANSI 2500.
HSVS086
In comparison with the standard model, the HSVS086 is equipped with a two-stage release mechanism and an extra valve bushing.
The two-stage release mechanism features the option of controlling greater capacities while maintaining accuracy by means of an extra reduction of disturbance forces on the control mechanism. Another advantage is the increase in the maximum closing member lift that uses the same standard control mechanism.
In addition, it is easier to commission and maintain because, in the closed position, the first stage can be activated independently from the second stage, thus making it possible to set the mechanism and carry out fine adjustments without activating the valve body assembly.
Operation
HSV086
The HSV086 safeguards against exceeding a maximum pressure and falling beneath a minimum pressure. The protection against underpressure serves also as a protection against a diaphragm rupture.
Protection against overpressure:
When the pressure to be safeguarded (1) in the sensing element (3) exceeds the maximum value set with the springs (5) and (6), the diaphragm (2) is pushed downwards and turns the lever (8) around the pivot (9). The pin (7) is pushed upwards, turning the balance (10) to the right side around the pivot (11).
When the pressure to be safeguarded (1) in the sensing element (3) exceeds the maximum value set with the springs (5) and (6), the diaphragm (2) is pushed downwards and turns the lever (8) around the pivot (9). The pin (7) is pushed upwards, turning the balance (10) to the right side around the pivot (11).
This results in the downward aimed switch pin (18) eventually stops being supported by the balance (10), causing the switch lever (16) to turn on its shaft. This shaft (17) is the supporting point for the closing member with closing member stem (20). When the switch lever (16) has rotated a 90o turn, the closing member (20) closes due to the closing spring (19) located in the valve body. In the closed position, the pressure behind the closing member will be reduced to the outlet pressure. The pressure difference between inlet and outlet pressure provides an additional closing force to the closing member (20).The safety device is now locked. The closing member will also remain shut even if the safeguarded pressure (1) drops below the maximum value.
Protection against underpressure:
When the safeguarded pressure (1) in the sensing element (3) is lower than the trip value set with the spring (6), the diaphragm (2) shifts upwards. Using its spring cup (4), the top part of the adjusting spring (5) comes to rest against the housing of the control mechanism and no longer against the diaphragm (2), causing the pressure for switching to be determined by the spring (6) alone.
The lever (8) will now push the pin (12) downwards, causing the balance (10) to rotate to the right, just as when maximum pressure is exceeded. The actions of the switch lever (16) and the closing member (20) are similar to those when maximum pressure is exceeded.
The closing member shuts in the same way in the event of a diaphragm rupture.
Unlocking
After correcting the failure or malfunction and a pressure equalisation across the closing member (20), the mechanism can only be openend manually. This is accomplished by pushing down the lifting arm (13), turning it to the right and simultaneously pushing the reset button (15). After the mechanism has been opened, a spring pushes the lifting arm back into starting position and the relatching device (14) is dis¬engaged.
HSVS086
The release operation for the first stage is identical to that of the HSV086. The difference is the release of a second stage. If the standard control mechanism (8) releases, the lever (10) will rotate to the right around the pivot (4). A rotation of approximately 15o causes the closing member stem (5) to no longer be supported by shaft (2), causing the closing member (6) to shut. The closing member and the closing member stem are pushed into the seat ring by gravity and by the closing spring (11).
Unlocking the second stage after correcting the failure or malfunction and the pressure equalisation across the closing member, occurs after unlocking the standard control mechanism (8). The valve (6) is easy to open, using the hand wheel (1).
Features
- Low maintenance costs
- Long maintenance interval because of:
- minimal friction
- minimal number of parts
- Easy to assemble / disassemble:
- valve body remains in line during maintenance
- seat ring is easy to inspect
- The use of economical materials
- Long maintenance interval because of:
- Modular construction
- separation between sensing element, control mechanism and valve body assembly
- sensing element(s) and control mechanism(s) are identical for every nominal diameter and pressure class
- Special patented valve seat
- long maintenance interval due to the erosion-free enclosure of the seat ring
- bubble-tight even at low temperatures
- High degree of operational safety
- not sensitive to vibration
- minor dynamic trip mechanism displacement
- single suspension closing member (HSV086)
- short safety circuit
- High reproducibility / accuracy
- minimal hysteresis
- Emergency button closes in case of:
- a break in the sensing line
- diaphragm rupture in combination with minimum pressure shut-off
- Double construction
- one valve with two control mechanisims, for safeguarding two pressures
- Accessories
- various sensing elements / adjusting springs
- closing by remote control
- position indicator on closing member
- open/close sensors on closing member
- Clear and complete technical documentation
- satisfies current requirements
- available in different languages
Technical specifications
General:
| Type indication | BAAI HSV086 (nominal sizes 1-12") BAAI HSVS086 (nominal sizes >= 16") |
| Pressure class | ANSI 300 and ANSI 600 (**) |
| Maximum pressure | ANSI 300: 50 bar ANSI 600: 100 bar |
| Operating temperature | -20°C to +60°C (***) |
| Ambient temperature | -30°C to +60°C (***) |
| Set range for overpressure | ANSI 300: 3-49.5 bar ANSI 600: 3-90 bar (*) |
| Set range for underpressure | 0.7 – 10 bar (*) |
(*) Higher set range for underpressure protection upon request
(**) Other pressure classes upto ANSI 2500 are available
(***) Other temperature ranges on request
Flow coefficient HSV086:
| Nominal size | Cg value | |
| Inches | mm | |
| 1" | 25 | 480 |
| 2" | 50 | 1.950 |
| 3" | 80 | 4.300 |
| 4" | 100 | 7.050 |
| 6" | 150 | 15.100 |
| 8" | 200 | 26.060 |
| 10" | 250 | 40.800 |
| 12" | 300 | 60.050 |
Flow co-efficient HSVS086 upon request
Classification acc. DIN 3381:
| Accuracy group | AG 1: 20 - 90 bar |
| Overpressure protection | AG 2.5: 3 - 20 bar |
| Accuracy group | |
| Underpressure protection | AG 5: 0.7 - 10 bar (*) |
| DIN-DVGW registered & CE marked | |
(*) Note: All pressures listed in table are overpressures
Measurements (mm) and weights (kg):
| Nominal size ANSI 300/600 | ANSI 300 | ANSI 600 | ANSI 300/600 | ||||
| Inches | mm | L | Weight | L | Weight | H | |
| 1" | 25 | 203 | 30 | 216 | 33 | 555 | |
| 2" | 50 | 267 | 45 | 292 | 45 | 615 | |
| 3" | 80 | 318 | 65 | 356 | 70 | 655 | |
| 4" | 100 | 356 | 105 | 432 | 115 | 665 | |
| 6" | 150 | 445 | 195 | 559 | 210 | 715 | |
| 8" | 200 | 559 | 295 | 660 | 320 | 867 | |
| 10" | 250 | 787 | 455 | 787 | 550 | 995 | |
| 12" | 300 | 838 | 600 | 838 | 660 | 960 | |
Measurements and weights for HSVS086 upon request
Material specifications:
| Part | Material |
|---|---|
| Valve body | A216-WCB / GS-C25N or equal |
| 1"/DN25: S355 or equal | |
| Bonnet flange | S355 or A352-LCC(QT) |
| Valve plug | S355 or equal |
| Valve plug stem | SS |
| Seat | SS |
| Control mechanism | SS |
| Diaphragm | NBR with Nylon reinforcement |
| Dynamic O-rings | Viton |
| Static O-rings | NBR |
| Sensing element | S355 or equal |
Special materials upon request
