4×3 External Chemical Hydraulic Valve
Betts External Chemical Hydraulic Valve is classified as an external self-closing stop valve and is widely used on DOT407 and 412 cargo tanks. This is a robust and proven valve that satisfies the many requirements of the chemical transportation industry. The 316 stainless steel construction with optional Hastelloy® overlay and replaceable Teflon™ seat make this valve a versatile and reliable workhorse for any fleet.
This valve does NOT include a sacrificial shear section; therefore, the cargo tank must have adequate accident damage protection to shield the valve as specified in 49CFR §178.345-8.
The hydraulic actuator has a ¼” NPT inlet port and is specifically designed to completely isolate hydraulic fluid from cargo tank and piping. Hydraulic leaks are contained in the piston cylinder and will drain to the exterior of the valve through the indicator weep holes as an alert for repair.
Two indicator pins are located on the bottom of the piston cylinder and move in relation to the disc. The pins can be used as a push point to manually jack open the valve.
- Valve MAWP: 50 psi [3.4 bar]
- Min. bursting pressure: 200 psi [13.8 bar]
- Working temperature range: -40°F to 400°F [-40°C to 204°C]
- Max. steam jacket pressure: 150 psi [10.3 bar]
- Hydraulic line pressure: Minimum 1,500 psi [103 bar] Maximum 3,500 psi [241 bar]
- Hyd. volume to fully open valve: 1.22 in3 [20 ml]
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- A solid flat mounting surface must be provided. Recommended mounting pad is MP19752LC.
- Recommended hydraulic pump is HP46982ALSL and hydraulic distributor is CH16283 or HD2-1EYBN
- Product Details
- Repair Kits and Accessories
- Installation & Maintenance
- Engineering Bulletins
- Videos
- Prop 65
Product Details
| Assembly Part # | Exposed Material | Inlet Flange (4" Sump) | Outlet (3" TTMA) | Dims. A | Dims. B | Dims. C | Wt. lb. [kg] |
|---|---|---|---|---|---|---|---|
| CH46955SST | 316 Stainless Steel Body with PTFE Seals | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] | B.C.: 4.88" Dia. [124 mm] 8 Holes: .438" Dia. [11.1 mm] | 4.75" [121 mm] | 4.50" [114 mm] | Closed: 16.25" [413 mm] Open: 14.65" [372 mm] | 29 [13.2] |
| CH46955LHT | 316 Stainless Steel with Hastelloy® C-22 overlay on the disc to fortify the area in contact with the seal. With PTFE Seals. | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] | B.C.: 4.88" Dia. [124 mm] 8 Holes: .438" Dia. [11.1 mm] | 4.75" [121 mm] | 4.50" [114 mm] | Closed: 16.25" [413 mm] Open: 14.65" [372 mm] | 29 [13.2] |
| CH46955LHT026 | 316 Stainless Steel with Hastelloy® C-22 overlay on the disc to fortify the area in contact with the seal and additional corrosion protection with a solid Hastelloy® C-276 upper stem. With PTFE Seals. | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] | B.C.: 4.88" Dia. [124 mm] 8 Holes: .438" Dia. [11.1 mm] | 4.75" [121 mm] | 4.50" [114 mm] | Closed: 16.25" [413 mm] Open: 14.65" [372 mm] | 29 [13.2] |
| CH46955LHHGTS | 316 Stainless Steel with Halar coating. With PTFE Seals. | B.C.: 7.25" Dia. [184 mm] 8 Holes: .563" Dia. [14.3 mm] | B.C.: 4.88" Dia. [124 mm] 8 Holes: .438" Dia. [11.1 mm] | 4.75" [121 mm] | 4.50" [114 mm] | Closed: 16.25" [413 mm] Open: 14.65" [372 mm] | 29 [13.2] |
| ** 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. Part number ending in “LHT026” provides the Hastelloy® overlay disc and adds additional corrosion protection with a solid Hastelloy® C-276 upper stem. See CH46955LHHGTS for special Halar™ coated valve. • Suffix “017” option for valve with double O-ring replaceable seat. • A solid flat mounting surface must be provided. Recommended mounting pad is MP19752LC. (Section 40) • Recommended hydraulic pump is HP46982ALSL and hydraulic distributor is CH16283. (Section 35) |
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Repair Kits and Accessories
Replacement Kit of Teflon Parts:
CH75296TF – Includes items – 4,6,9,10,13,16,17,18,19
CH75296TFTS – Includes items – 4,6a,9,10,13,16,17,18,19
Conversion Kit from Old Style Single Piece Stem to New Style Two Piece Stem:
CH75297TF – Includes items – 4,5,6,8,9,10,11,12,13,14,16,17,18,19
CH75297TFTS – Includes items – 4,5,6a,8,9,10,11,12,13,14,16,17,18,19
Additional Options
Betts prides itself in being able to provide products that meet a customer’s specific needs. As a result we do offer modifications to our product standards. While not every request is always feasible, we do our best to meet your specific needs. In many cases this modification is noted by adding a suffix to the end of the standard part number. The following is a non-inclusive list of common options that are available for this product line . If the options listed below do not meet your requirements please contact one of Betts’ Customer Service Representatives for further assistance. Please note that some product modifications may result in extended lead times.
Commonly Requested Options:
- Suffix “017” option for valve with double O-ring replaceable seat. Item 6a.
- Suffix “019” option for valve with double O-ring cap collar. Item 2a.
- Add suffix “J” to Part No. for heat tube version. (Heat tube MAWP = 150 psi)
Installation & Maintenance
External Chemical Hydraulic Valve Maintenance Manual #MM-CH004
Videos
External Chemical Hydraulic Valve Maintenance Video #MV-CH004
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/