Internal Chemical Hydraulic Valve
Betts Internal Chemical Hydraulic Valve is classified as an internal self-closing stop valve and is widely used on DOT407 and 412 cargo tanks. The design of the internal valve shields the spring, valve seat, and hydraulic actuator safely within the confines of the cargo tank. The 316-stainless body with an optional Hastelloy® overlay seat and replaceable Teflon™ seal make this a versatile and proven valve that satisfies the many requirements of the chemical transportation industry.
This valve meets the requirements of 49CFR §178.345-8 as tested and verified per TTMA RP84 when it is properly mounted and used in conjunction with a certified 4×3 shear elbow or 4×4 shear elbow.
The flange has a 1/8” NPT inlet port for the hydraulics and phonographic finish on the faces to ensure proper gasket sealing.
- Valve MAWP: 50 psi [3.4 bar]
- Minimum bursting pressure: 200 psi [13.8 bar]
- Working temperature range: -40°F to 400°F [-40°C to 204°C]
- Hyd. line pressure: Minimum 1,500 psi [103 bar], Maximum 3,500 psi [241 bar]
- Hyd. volume to fully open valve: 1.05 in3 [17.2 ml]
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- For proper installation, a solid flat mounting surface must be provided with extended studs. See mounting pad (MP19741LC) and special gasket (G27229TD) for use between valve and elbow.
- Recommended hydraulic pump is HP46982ALSL and hydraulic distributor is CH16283.
Product Details
| Assembly Part # | Material* | Mounting Flange (4" Sump) | Weight |
|---|---|---|---|
| CH47003SST | 316 SS | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] O.D.: 8.19" Dia. [208 mm] | 31 lb. [14 kg] |
| CH47003LHT | 316 SS w/ Hastelloy® trim** | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] O.D.: 8.19" Dia. [208 mm] | 31 lb. [14 kg] |
| *Material listing is for all wetted surfaces exposed to product during normal operation valve. **Part number ending in "LHT" provides a valve with a Hastelloy® C-22 overlay on the disc to fortify the area in contact with the seal. |
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Technical Data
Engineering Bulletins
EB-03-03: Plumbing Schematic for Hydraulic Valve System
EB8-08: Important Design Modification Alert
EB-06-25: Internal Hydraulic Valve Stem/Spring Retainer Design Enhancement
Installation and Maintenance Manual
MM-CH005: Internal Chemical Hydraulic Valve
Instructional Videos
MV-CH005: Internal Chemical Hydraulic Valve Rebuild Video
Prop 65
WARNING: This product can expose you to chemicals including Chromium (hexavalent compounds) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov. For additional information on Betts products and Proposition 65 list please see: https://www.bettsind.com/prop-65/