Spirax Sarco 1250990 MST21 Thermostatic Steam Trap 1/2" FNPT 518°F 304psig NSMP

eBay Listing - Spirax Sarco 1250990 Spirax Sarco 1250990 MST21 Thermostatic Steam Trap 1/2" FNPT 518°F 304psig NSMP Part Number / MPN: 1250990 (12509090) Product Line Family: MST21 Series Stainless Steel Balanced Pressure Traps Technical Sub-Type: Replacement Element / Sub Capsule Module Performance Profile: 40 Degree Fahrenheit Subcool Thermal Rating Connection Size / Fitment: 1/2" NPT Steam Lines Condition Class: New Surplus Manufacturer Package (NSMP) Product Overview Up for sale is a brand-new Spirax Sarco 1250990 replacement sub-capsule mechanism for the industry-standard **MST21 Series** stainless steel thermostatic balanced pressure steam traps. This precision fluid instrumentation component is custom-engineered to handle thermal loop modulation in commercial steam setups, lines, and heat tracing loops. Factory-calibrated for a **40 Degree Subcool profile**, the internal bellows capsule holds a thermal liquid mix that responds immediately to pressure changes, expanding to close the trap near steam saturation and contracting to discharge cooled condensate exactly 40°F (approx. 22°C) below saturation temperature. Excellent choice as a critical maintenance spare to prevent energy loss and water-hammer stress in institutional steam loops. Technical Specifications Brand / Manufacturer: Spirax Sarco Part Number / MPN: 1250990 Trap Compatibility Series: MST21 and MST21H Stainless Steel Thermostatic Steam Traps Component Profile: Thermostatic Balanced Pressure Replacement Bellows Capsule Nominal Size Fitment: 1/2-Inch NPT Pipe Layouts Thermal Subcool Rating: 40°F (Fahrenheit) Sub-Cool Configuration Operational Objective: Automatic non-condensible gas venting and condensate drainage control Condition & Seller Guarantees Item Condition: New Surplus in Original Packaging (NSMP). This replacement capsule module is in brand-new, completely uninstalled condition. It has never been threaded into a trap body housing, piped into an active line, or exposed to high-temperature system scaling loops. It remains safely clean-preserved inside its original factory cardboard package box carrying the authentic identifiers pictured. Storage Practices: Maintained in a dedicated dust-shielded, climate-controlled warehouse layout to completely protect the internal precision bellows element and metal sealing edges from environmental moisture or oxidation. Manufacturer Support Disclaimer: Manufacturer's warranties and official direct technical support lines DO NOT apply to this item. Offered strictly as independent industrial pipeline distribution surplus replacement hardware overstock. Seller Warranty: We fully cover this steam trap hardware unit with our comprehensive 120-Day Seller Replacement/Refund Warranty protecting your plant maintenance loop or mechanical installation schedule against unexpected component faults. Standard Shipping Logistics Expedited Shipping: Same-day shipping is available on most orders made before 4:00 PM EST. Orders finalized after this cutoff time slice will be securely processed and dispatched on the following business day to ensure minimum maintenance window or contractor layout downtime. Secure Parcel Packaging: The module inside its factory box will be securely surrounded with layers of protective cushioning film and packed safely inside an outer double-walled generic corrugated shipping box to guarantee clean, zero-movement transit conditions. Collect Carrier Account Billing: We can ship collect using the buyer's corporate UPS or FedEx account! To coordinate collect billing, please send us a direct message containing your verified shipping carrier account details, preferred service classification (e.g., Ground, Priority Overnight), and billing zip code prior to checking out. ____________________________________________________________________________________________ C114 Sell Your Surplus â We Buy Industrial Equipment! Do you have industrial automation gear, manufacturing components, or electrical equipment sitting idle in your warehouse? Turn your excess inventory into cash! We buy a wide array of industrial surplus items, including: Automation & Control: PLCs, HMIs, drives, and servo motors Instrumentation & Sensors: Pressure transmitters, temperature controllers, and transducers Electrical Supply: Circuit breakers, contactors, transformers, and switchgear Pneumatics & Hydraulics: Valves, cylinders, pumps, and regulators Whether you have a single overstock part or an entire facility's worth of decommissioned inventory, we offer competitive cash offers and fast, hassle-free logistics. Send us a direct message today with your part numbers and photos to get an offer! Trademark Notice: All product names, logos, and brands are the property of their respective owners. Manufacturer names and model numbers are used strictly to identify the item and demonstrate compatibility. No Affiliation: The seller is an independent distributor of surplus equipment and is not affiliated with, authorized by, or endorsed by any original equipment manufacturer (OEM). Warranties: Because this item is sold as industrial surplus, any original manufacturer warranties may not apply or be transferable. Buyers should verify technical specifications independently.