Product Overview
The HN68 Long Type Bellow Seal Globe Valve is an extended construction bellow seal globe valve designed for closing and selected throttling service in compatible liquid and gaseous media. Compared with compact bellow seal globe valve designs, HN68 uses a longer upper structure and higher overall dimensions.
This valve is suitable for steam, thermal oil, heat transfer fluids, water, air, gas, natural gas, gas condensate, technological solutions and selected non-aggressive industrial media. Typical application areas include power engineering, chemical plants, petrochemical facilities, steam distribution systems and general industrial pipelines.
HN68 is available from DN15 to DN400 with PN16, PN25 and PN40 pressure ratings. The product can be configured with flanged or butt-welded connection options according to project requirements. Final connection standard, material grade and trim configuration should be confirmed during quotation and drawing approval.
Key Features
- Long type bellow seal globe valve construction with extended upper structure.
- Bellow seal assembly helps reduce stem leakage risk compared with packing-only globe valves.
- Non-rising handwheel with rising stem arrangement according to catalog construction.
- Guide disc option may be considered for applications requiring controlled flow regulation.
- Guide gasket arrangement helps support stem stability during service.
- Secondary flexible graphite sealing provides backup containment if the bellow is damaged.
- Stop block design helps control stem stroke and protect the bellow from over-stroke deformation.
- Available with handwheel operation, electric actuator option and ISO 5210 actuator-ready flange by project requirement.
Sectional Structure and Materials
The numbered sectional drawing corresponds to the position numbers in the materials table. Final material selection should be confirmed according to pressure rating, temperature and fluid compatibility.
| Pos. | Name | Typical Material Options |
|---|---|---|
| 1 | Body | 1.0619 / A216 WCB; 1.7357 / A217 WC6; 1.4408 / A351 CF8M |
| 2 | Seat | 13Cr, STL6 |
| 3 | Disc | X20Cr13 + QT, A105, F316 |
| 4 | Disc screw | Carbon steel, stainless steel |
| 5 | Stem | X20Cr13, F316 |
| 6 | Gasket | Graphite + stainless steel |
| 7 | Bonnet | 1.0619 / A216 WCB; 1.7357 / A217 WC6; 1.4408 / A351 CF8M |
| 8 | Bolt | ASTM A193 B7, A193 B16, A193 B8M |
| 9 | Nut | ASTM A194 2H, A194 4, A194 8M |
| 10 | Bellows | SS304, SS316L |
| 11 | Packing | Graphite |
| 12 | Gland | 1.0619 / A216 WCB; 1.7357 / A217 WC6; 1.4408 / A351 CF8M |
| 13 | Nut | ASTM A194 2H, A194 4, A194 8M |
| 14 | Eyelet bolt | ASTM A193 B7, A193 B16, A193 B8M |
| 15 | No rotating device | A105, F304 |
| 16 | Grease nipple | Cu alloy |
| 17 | Stem nut | GGG40.3; Cu alloy |
| 18 | Screw | Carbon steel |
| 19 | Handwheel | Steel |
| 20 | Lock nut | Carbon steel |
Typical materials are listed for preliminary selection. Other material combinations may be discussed according to actual service conditions.
Technical Specifications
| Product type | Long type bellow seal globe valve |
|---|---|
| Nominal size | DN15-DN400 |
| Pressure rating | PN16, PN25, PN40 |
| Connection options | Flanged or butt-welded, project-confirmed |
| Operation | Handwheel standard; electric actuator option by project requirement |
| Actuator interface | ISO 5210 ready flange by project requirement |
| Bellow material | SS304, SS316L |
| Body material options | A216 WCB, A217 WC6, A351 CF8M or project-confirmed equivalent |
| Seat and trim | 13Cr, STL6, A105, F316 or project-confirmed trim |
| Temperature range | Material and pressure rating dependent |
Dimensions and Performance Data
The drawings show the corresponding dimensional symbols used in the table below. Values are for preliminary selection and should be confirmed against approved drawings before order.
| Parameter | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 | DN65 | DN80 | DN100 | DN125 | DN150 | DN200 | DN250 | DN300 | DN350 | DN400 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L, mm | 130 | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 600 | 730 | 850 | 980 | 1100 |
| H, mm | 275 | 280 | 290 | 300 | 340 | 350 | 410 | 455 | 505 | 610 | 700 | 770 | 945 | 1080 | 1185 | 1360 |
| Stroke, mm | 8 | 8 | 10 | 10 | 15 | 18 | 22 | 25 | 30 | 40 | 50 | 60 | 80 | 90 | 105 | 115 |
| Weight FL PN16, kg | 5 | 5.5 | 6.5 | 8.5 | 11.5 | 14 | 20 | 26 | 44 | 63 | 112 | 195 | 330 | 450 | 660 | 880 |
| Weight FL PN25, kg | 5 | 5.5 | 6.5 | 8.5 | 11.5 | 14.5 | 23 | 30 | 48 | 70 | 121 | 220 | 350 | 475 | 690 | 950 |
| Weight FL PN40, kg | 5 | 5.5 | 6.5 | 8.5 | 11.5 | 14.5 | 23 | 30 | 48 | 70 | 121 | 230 | 370 | 495 | 710 | 990 |
| Weight BW PN16, kg | 3.4 | 3.7 | 4.5 | 5.5 | 7.4 | 9 | 16 | 20 | 34 | 50 | 95 | 185 | 295 | 390 | 580 | 810 |
| Weight BW PN25, kg | 3.4 | 3.7 | 4.5 | 5.5 | 7.4 | 9 | 16 | 20 | 34 | 50 | 95 | 200 | 300 | 415 | 600 | 870 |
| Weight BW PN40, kg | 3.4 | 3.7 | 4.5 | 5.5 | 7.4 | 9 | 16 | 20 | 34 | 50 | 95 | 200 | 300 | 415 | 600 | 870 |
| Kv | 4.2 | 7.4 | 12 | 19 | 30 | 47 | 77 | 120 | 188 | 288 | 410 | 725 | 1145 | 1635 | 2225 | 2906 |
Pressure-Temperature Reference
The maximum allowable working pressure varies with operating temperature and material grade. The following table is catalog reference data based on EN 12516-1.
| Material | PN | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 425 | 450 | 500 | 525 | 550 | 575 | 595 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1.0619 / A216 WCB | 16 | 1.36 | 1.27 | 1.14 | 1.04 | 0.94 | 0.88 | 0.84 | – | – | – | – | – | – | – |
| 1.0619 / A216 WCB | 25 | 2.13 | 1.98 | 1.78 | 1.62 | 1.47 | 1.37 | 1.32 | – | – | – | – | – | – | – |
| 1.0619 / A216 WCB | 40 | 3.41 | 3.17 | 2.84 | 2.60 | 2.35 | 2.19 | 2.11 | – | – | – | – | – | – | – |
| 1.4408 / A351 CF8M | 16 | 1.33 | 1.20 | 1.10 | 1.02 | 0.96 | 0.91 | 0.87 | 0.86 | 0.86 | 0.83 | – | – | – | – |
| 1.4408 / A351 CF8M | 25 | 2.07 | 1.87 | 1.72 | 1.60 | 1.50 | 1.42 | 1.36 | 1.35 | 1.34 | 1.30 | – | – | – | – |
| 1.4408 / A351 CF8M | 40 | 3.32 | 2.99 | 2.75 | 2.56 | 2.41 | 2.27 | 2.18 | 2.16 | 2.14 | 2.08 | – | – | – | – |
| 1.7357 / A217 WC6 | 16 | 1.63 | 1.58 | 1.49 | 1.43 | 1.33 | 1.23 | 1.15 | 1.11 | 1.07 | 0.89 | 0.68 | 0.35 | 0.28 | 0.20 |
| 1.7357 / A217 WC6 | 25 | 2.54 | 2.48 | 2.33 | 2.23 | 2.08 | 1.93 | 1.80 | 1.73 | 1.67 | 1.39 | 1.06 | 0.55 | 0.43 | 0.32 |
| 1.7357 / A217 WC6 | 40 | 4.07 | 3.96 | 3.74 | 3.57 | 3.33 | 3.09 | 2.89 | 2.77 | 2.67 | 2.23 | 1.70 | 0.88 | 0.69 | 0.52 |
Temperature values not listed in the table should be selected by linear interpolation method or confirmed during project review.
Disc Type Options
- Regulating disc design may be selected for throttling-oriented service conditions.
- Balance disc type may be considered for larger sizes or higher pressure combinations where operating force should be reduced.
- Guide disc type is typically considered for DN200 and above, subject to project configuration.
- Disc construction should be confirmed according to DN, PN, operating pressure differential and service requirements.
Applications
- Steam systems: suitable for steam distribution and condensate return service where bellow stem sealing is preferred.
- Thermal oil and heat transfer systems: used in industrial heating circuits and process lines.
- Power engineering: applicable to auxiliary steam, boiler-related services and plant utility pipelines.
- Chemical and petrochemical service: selected compatible media where stem sealing reliability and maintenance planning are important.
- Gas and non-aggressive industrial media: project-confirmed service for air, gas and related compatible media.
- General industrial pipelines: closing and selected throttling service in compatible fluid systems.
Testing, Installation and Operation
Testing
- Pressure test by water for strength and tightness according to EN 12266.
- Shell test: nominal pressure PN x 1.5.
- Seat tightness test: nominal pressure PN x 1.1.
- Certification and documentation requirements should be confirmed by project.
Installation
- Install in horizontal lines with upright position unless project drawing confirms otherwise.
- Flow direction should follow the body mark.
Operation
- Handwheel operation.
- Electric actuator option by project requirement.
- ISO 5210 ready flange by project requirement.
Standards and Compliance
- Pressure testing: EN 12266.
- Nominal size and pressure class: DN15-DN400, PN16-PN40.
- Connection and face-to-face standards should be confirmed according to approved project drawings.
- Material selection should be confirmed according to pressure rating, temperature and media compatibility.
Connection details should be confirmed according to the approved project drawing and quotation requirements.
FAQ
Q: What is the difference between HN68 and HN60?
A: HN68 is a long type bellow seal globe valve with a taller upper structure and higher overall H dimensions. HN60 is the compact bellow seal globe valve series. Final selection depends on installation space, sealing arrangement and project requirements.
Q: What size and pressure range is available for HN68?
A: HN68 is listed from DN15 to DN400 with PN16, PN25 and PN40 pressure ratings.
Q: Can HN68 be supplied with flanged or butt-welded ends?
A: Yes. The catalog identifies flanged and butt-welded configurations. Final connection details should be confirmed during quotation and drawing approval.
Q: Can HN68 be used for throttling service?
A: HN68 is designed for closing and selected throttling service. For regulating service, disc type, pressure differential and operating conditions should be reviewed before order.
Q: Are actuator options available?
A: Handwheel operation is standard. Electric actuator options and ISO 5210 actuator-ready flange can be discussed based on project requirements.
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