Predictika · Brazed plate heat exchanger quotes

An AI sales agent's heat exchanger quote, checked before it goes out

An AI sales agent prepares a quote for brazed plate heat exchangers from the GBS-Series: the model, the plate count, the working pressure and temperatures, the space available and the features the customer wants. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the public product overview and returns a verdict, every reason and the figures it computed.

Scope: Kelvion GBS-Series brazed plate heat exchanger quotes: model, plate count, pressure, temperature, space and features. See everything this validator covers

This validator models quotes for 20 models of the GBS-Series in the public Kelvion GBS-Series Product Overview (GBS-UK04/18), not just the scenarios shown below.

  • Model limits — the working pressure rating and the most plates each model allows, checked against the quote, with the unit length L and mass computed from the plate count using the published formulas.
  • Operating limits and materials — working temperatures from −196 to +200 °C, copper brazing and stainless steel 316L plates, which are what the GBS-Series uses; a request for nickel or VacInox brazing or other plate material is blocked.
  • Features and approvals — the Safety Chamber feature on models 700, 757, 800, 900 and 1000, the Delta Injection distribution on the advanced evaporator (AE) models, and the listed approvals (PED, ASME VIII-1, UL); any other approval, and any unit whose thermal selection has not been confirmed, goes to a person.
  • Space and totals — the computed unit length compared with the space available, and the plate total stated on the quote compared with the units quoted.

Any GBS-Series quote that touches these rules is in scope — not only the scenarios pictured here. Not covered: prices (Kelvion publishes no list prices for the GBS-Series, so this validator produces no price build-up), thermal sizing itself (which Kelvion does from the customer's duty), models with two published pressure ratings (525, 760, 910 and 1000L), the L, M and H plate variants within a model, other Kelvion series and other product lines. Assumptions: the Safety Chamber and Delta Injection availability is read from the model lists in the overview, and the approval and thermal-selection checks follow the overview's statement that binding performance data depends on a precise request.

The AI sales agentBuilds the heat exchanger quote from the customer's request and says it is ready.
Predictika validatorChecks every rule at once and returns the verdict, each finding, and the computed figures.

8 scenarios in 4 groups · each group runs from the agent’s first attempt to the outcome · click one to switch

What the agent proposes

The AI sales agent says

Illustrative agent statement. The validator receives the structured request below.

Proposing agent: AI sales agent (scripted)

Before sending, the agent must call Recorded run

Predictika validator


      

        
        
        
      

      
Waiting for the call.

      
    

  

  
  

    
Where rules-based CPQ gets it wrong
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Our assessment of what a typical rules-based CPQ (product rules, price rules and validation rules, as in Salesforce CPQ) does with the same cases. It is a judgment about effort and reliability, not a claim that nothing can be built.

    
What the validator caughtTypical rules-based CPQPredictika
A plate count limit that differs by modelOnly with care
A maximum per model in a lookup table to be kept in step with the overview; a limit on every line of the order.		The limit is looked up from the model and checked on every call.
A length computed from the plate count and checked against the space availableOnly with workarounds
A formula with a different constant for each model, compared with a customer figure; most rule sets do not hold a formula per model.		The length is computed from the published formula and compared with the space on every call.
A pressure rating that differs by modelOnly with care
A rating per model that must be compared with the customer's working pressure.		The rating is looked up from the model and compared with the working pressure.
Features that only some models haveOnly with workarounds
Cross-field rules between the feature and the model that have to be added and kept up to date by hand.		The Safety Chamber and Delta Injection lists are checked against the model with everything else.
Materials and limits that the whole series sharesEasy
A fixed rule on the series.		The same fixed rule, checked with the others.
A stated plate total that disagrees with the units quotedOnly with workarounds
The figure the agent states is a separate field and needs an extra rule that compares it with the units.		The stated total is part of the request and is compared with the quoted units on every call.
Every problem returned in one answerOnly with workarounds
Rules tend to fire as the quote is saved or a step is completed, so a rep often fixes one error and meets the next.		All findings come back together, whatever order the choices arrived in.

  

  

    
What this validator catches: findings from its test cases
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Every rule is checked on every call, in any order the choices arrive; one problem never hides another. Blocking findings stop the quote; approval findings need a person to sign off; everything else is computed.

    
1Kelvion states that performance data is binding only for precise requests; a person should confirm the thermal selection (temperatures, flow or heat load, pressure drop) for this unit.
2The quote has 101 plates per unit; this model allows at most 100 plates.
3The quote has 51 plates per unit; this model allows at most 50 plates.
4The quote has 361 plates per unit; this model allows at most 360 plates.
5The quote has 0 plates per unit; at least 1 is needed.
6The working pressure of 32 bar is over the 31 bar listed for this model.
7The working pressure of 41 bar is over the 40 bar listed for this model.
8The working pressure of 36 bar is over the 35 bar listed for this model.
9A maximum working temperature of 201 °C is over the GBS-Series limit of 200 °C.
10A minimum working temperature of −197 °C is below the GBS-Series limit of −196 °C.
11The unit length L of 99.1 mm does not fit the 99 mm available.
12The GBS-Series is copper brazed; the quote asks for a different brazing material.
13The GBS-Series plates are stainless steel AISI 316L (1.4404); the quote asks for a different plate material.
14The Safety Chamber feature is listed only for models 700, 757, 800, 900 and 1,000; this model does not have it.
15The Delta Injection refrigerant distribution is listed only on the advanced evaporator (AE) models; this model is not an AE model.
16The GBS-Series approvals listed are PED (CE), ASME VIII-1 and UL; a person should confirm the other approval the customer asks for.
17The quote states 90 plates in total; the quoted units give 80.
18The quote states 79 plates in total; the quoted units give 80.
19The quote has 0 units; at least 1 is needed.
20The quote has 60 plates per unit; this model allows at most 50 plates.
21The working pressure of 35 bar is over the 31 bar listed for this model.
22A maximum working temperature of 250 °C is over the GBS-Series limit of 200 °C.
23The unit length L of 144.4 mm does not fit the 100 mm available.

  

  

    
Scenarios and results
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The recorded result of the validator for each scenario on this page: the request the AI agent sent, the verdict, and every finding, in the order they appear above.

    
1. Evaporator feature and space: A three-unit GBS 400H quote with Delta Injection, 60 plates and 120 mm available

    
The agent's request. Please quote three GBS 400H heat exchangers with 60 plates each, for a working pressure of 28 bar and temperatures from 10 to 150 °C, with 120 mm available for the length, with Delta Injection. The quote states 180 plates in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Unit longer than the space available. The unit length L of 143.9 mm does not fit the 120 mm available.
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  • Delta Injection needs an AE model. The Delta Injection refrigerant distribution is listed only on the advanced evaporator (AE) models; this model is not an AE model.
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2. Evaporator feature and space: The agent resubmits after fixing the errors

    
The agent's request. Please quote three GBS 400H-AE heat exchangers with 45 plates each, for a working pressure of 28 bar and temperatures from 10 to 150 °C, with 120 mm available for the length, with Delta Injection. The quote states 135 plates in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Unit summary. 3 unit(s) with 45 plates each, 135 plates in total; length L 110.3 mm and mass 7.45 kg per unit; rated 31 bar.
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3. Temperature and brazing: A two-unit GBS 700L/M quote at 210 °C with nickel brazing

    
The agent's request. Please quote two GBS 700L/M heat exchangers with 120 plates each, for a working pressure of 25 bar and temperatures from -10 to 210 °C, with 300 mm available for the length, with Nickel brazing. The quote states 240 plates in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Temperature over 200 C. A maximum working temperature of 210 °C is over the GBS-Series limit of 200 °C.
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  • GBS-Series is copper brazed. The GBS-Series is copper brazed; the quote asks for a different brazing material.
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4. Temperature and brazing: The agent resubmits after fixing the errors

    
The agent's request. Please quote two GBS 700L/M heat exchangers with 120 plates each, for a working pressure of 25 bar and temperatures from -10 to 200 °C, with 300 mm available for the length. The quote states 240 plates in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Unit summary. 2 unit(s) with 120 plates each, 240 plates in total; length L 281 mm and mass 74.4 kg per unit; rated 31 bar.
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5. Plate count: A two-unit GBS 700L/M quote with 160 plates per unit

    
The agent's request. Please quote two GBS 700L/M heat exchangers with 160 plates each, for a working pressure of 25 bar and temperatures from -10 to 120 °C, with 450 mm available for the length. The quote states 320 plates in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Plate count over the model maximum. The quote has 160 plates per unit; this model allows at most 150 plates.
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6. Plate count: The agent resubmits after fixing the errors

    
The agent's request. Please quote two GBS 757L/M/H heat exchangers with 160 plates each, for a working pressure of 25 bar and temperatures from -10 to 120 °C, with 450 mm available for the length. The quote states 320 plates in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Unit summary. 2 unit(s) with 160 plates each, 320 plates in total; length L 435.5 mm and mass 93.2 kg per unit; rated 35 bar.
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7. Features and approvals: A four-unit GBS 500H quote with the Safety Chamber and another approval

    
The agent's request. Please quote four GBS 500H heat exchangers with 50 plates each, for a working pressure of 20 bar and temperatures from 5 to 95 °C, with 200 mm available for the length, with the Safety Chamber and an approval other than PED, ASME or UL. The quote states 200 plates in total. It is ready to send.

    
Verdict: Blocked.

    
    
      
  • Safety Chamber not on this model. The Safety Chamber feature is listed only for models 700, 757, 800, 900 and 1,000; this model does not have it.
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  • Approval not listed for the series. The GBS-Series approvals listed are PED (CE), ASME VIII-1 and UL; a person should confirm the other approval the customer asks for.
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8. Features and approvals: The agent resubmits after fixing the errors

    
The agent's request. Please quote four GBS 800H heat exchangers with 50 plates each, for a working pressure of 20 bar and temperatures from 5 to 95 °C, with 300 mm available for the length, with the Safety Chamber and PED approval. The quote states 200 plates in total. It is ready to send.

    
Verdict: Allowed.

    
    
      
  • Unit summary. 4 unit(s) with 50 plates each, 200 plates in total; length L 128.5 mm and mass 37 kg per unit; rated 31 bar.
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Narration transcript
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The text of the narrated walkthrough, step by step.

    
    
      
  1. Welcome to a demo of Predictika's Validator. An AI sales agent prepares a quote for brazed plate heat exchangers from the GBS-Series: the model, the plate count, the working pressure and temperatures, and more. Before it goes out, the agent sends it to Predictika, which checks it against a declarative model of the public product overview and returns a verdict, every reason and the figures it computed.
    2. 
      
  2. I will start with the first request by the agent.
    3. 
      
  3. The agent says. Please quote three GBS 400H heat exchangers with 60 plates each, for a working pressure of 28 bar and temperatures from 10 to 150 °C. The quote states 180 plates in total. The rest of the request is on screen.
    4. 
      
  4. Before it goes out, the agent calls the validator.
    5. 
      
  5. Blocked, with two findings, all in one answer. The unit length L of 143.9 mm does not fit the 120 mm available. The Delta Injection refrigerant distribution is listed only on the advanced evaporator (AE) models; this model is not an AE model.
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  6. The validator returned two blocking findings in one answer. A check that reads one field at a time would pass most of this; it shows only when the choices in the quote are checked against each other.
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  7. What this shows: for a length computed from the plate count and checked against the space available, a rules-based CPQ can do this only with workarounds.
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  8. Now the agent resubmits.
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  9. The corrected request. It changes the model to GBS 400H-AE, the plates per unit to 45 and the stated plates in total to 135.
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  10. It calls the validator again.
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  11. This time the validator clears it.
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  12. Both earlier findings are cleared, and the validator's figure matches the quote.
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  13. Two problems caught in one call, fixed in one pass, and a clean quote. That is the value of Predictika's validator: catching mistakes before they reach the customer.
    14.